-
1
-
-
84867978004
-
Matching transformation graphs of cubic bipartite plane graphs
-
S. Bau, M.A. Henning, Matching transformation graphs of cubic bipartite plane graphs, Discrete Math. 262 (2003) 27-36.
-
(2003)
Discrete Math
, vol.262
, pp. 27-36
-
-
Bau, S.1
Henning, M.A.2
-
2
-
-
0004190631
-
-
Third edition, American Math. Soc, Providence
-
G. Birkhoff, Lattice Theory, Third edition, American Math. Soc., Providence, 1979.
-
(1979)
Lattice Theory
-
-
Birkhoff, G.1
-
4
-
-
0013004160
-
Hamilton paths in Z-transformation graphs of perfect matchings of hexagonal systems
-
R. Chen, F. Zhang, Hamilton paths in Z-transformation graphs of perfect matchings of hexagonal systems, Discrete Appl. Math. 74 (1997) 191-196.
-
(1997)
Discrete Appl. Math
, vol.74
, pp. 191-196
-
-
Chen, R.1
Zhang, F.2
-
5
-
-
0039118361
-
Directed tree structure of the set of Kekulé patterns of polyhex graphs
-
Z. Chen, Directed tree structure of the set of Kekulé patterns of polyhex graphs. Chem. Phy. lett. 115(3) (1985) 291-293.
-
(1985)
Chem. Phy. lett
, vol.115
, Issue.3
, pp. 291-293
-
-
Chen, Z.1
-
6
-
-
0029360203
-
Boron-nitride nanotubes
-
N.G. Chopra, R.J. Luyken, K. Cherrey, V.H. Crespi, M.L. Cohen, S.G. Louie, A. Zettl, Boron-nitride nanotubes, Science 269 (1995) 966-967.
-
(1995)
Science
, vol.269
, pp. 966-967
-
-
Chopra, N.G.1
Luyken, R.J.2
Cherrey, K.3
Crespi, V.H.4
Cohen, M.L.5
Louie, S.G.6
Zettl, A.7
-
8
-
-
0003622705
-
-
Springer, Berlin
-
S.J. Cyvin, J. Brunvoll and B.N. Cyvin, Theory of Coronoid Hydrocarbons, Lectures Notes in Chemistry 54, Springer, Berlin, 1991.
-
(1991)
Theory of Coronoid Hydrocarbons. Lectures Notes in Chemistry
, vol.54
-
-
Cyvin, S.J.1
Brunvoll, J.2
Cyvin, B.N.3
-
9
-
-
21344491510
-
Kekulé structures as graph generators
-
S. El-Basil, Kekulé structures as graph generators, J. Math. Chem. 14 (1993) 305-318.
-
(1993)
J. Math. Chem
, vol.14
, pp. 305-318
-
-
El-Basil, S.1
-
10
-
-
0001826739
-
Generation of lattice graphs. An equivalence relation on Kekulé counts of catacondensed benzenoid hydrocarbons
-
S. El-Basil, Generation of lattice graphs. An equivalence relation on Kekulé counts of catacondensed benzenoid hydrocarbons, J. Mol. Struct. (Theochem.) 288 (1993) 67-84.
-
(1993)
J. Mol. Struct. (Theochem.)
, vol.288
, pp. 67-84
-
-
El-Basil, S.1
-
11
-
-
3042526859
-
Lattice structures from planar graphs, Elect
-
R15
-
S. Felsner, Lattice structures from planar graphs, Elect. J. Combin. 11 (2004), #R15.
-
(2004)
J. Combin
, vol.11
-
-
Felsner, S.1
-
12
-
-
0037590605
-
Combinatorics of perfect, matchings in plane bipartite graphs and application to tilings
-
J.C. Fournier, Combinatorics of perfect, matchings in plane bipartite graphs and application to tilings, Theor. Comput. Sci. 303 (2003) 333-351.
-
(2003)
Theor. Comput. Sci
, vol.303
, pp. 333-351
-
-
Fournier, J.C.1
-
13
-
-
33748589450
-
Boron-nitrogen analogues of the fullerenes: The isolated-square rule
-
P.W. Fowler, T. Heine, D. Mitchell, R. Schmidt, G. Seifert, Boron-nitrogen analogues of the fullerenes: The isolated-square rule, J. Chem. Soc. Faraday Trans. 92 (12) (1996) 2197-2201.
-
(1996)
J. Chem. Soc. Faraday Trans
, vol.92
, Issue.12
, pp. 2197-2201
-
-
Fowler, P.W.1
Heine, T.2
Mitchell, D.3
Schmidt, R.4
Seifert, G.5
-
15
-
-
0002646891
-
Signifikante Elektronenstrukturen fur benzenoide Kohlenwasserstoffe
-
W. Gründler, Signifikante Elektronenstrukturen fur benzenoide Kohlenwasserstoffe, Wiss. Z. Univ. Halle 31 (1982) 97-116.
-
(1982)
Wiss. Z. Univ. Halle
, vol.31
, pp. 97-116
-
-
Gründler, W.1
-
16
-
-
0020747230
-
-
W. Gründler, Mesomerie und Quantenmechanic, Z. Chem. (Lepizig) 23 (1983) 157-167.
-
W. Gründler, Mesomerie und Quantenmechanic, Z. Chem. (Lepizig) 23 (1983) 157-167.
-
-
-
-
17
-
-
0001944694
-
Topological properties of benzenoid systems
-
Springer, Berlin
-
I. Gutman, Topological properties of benzenoid systems, in: Advances in the Theory of Benzenoid Hydrocarbons II, Topics in Current Chem. 162, Springer, Berlin, 1992.
-
(1992)
Advances in the Theory of Benzenoid Hydrocarbons II, Topics in Current Chem
, vol.162
-
-
Gutman, I.1
-
21
-
-
0009802336
-
Upper bounds for the Clar number of benzenoid hydrocarbons
-
P. Hansen and M. Zheng, Upper bounds for the Clar number of benzenoid hydrocarbons, J. Chem. Soc., Faraday Trans. 88 (1992) 1621-1625.
-
(1992)
J. Chem. Soc., Faraday Trans
, vol.88
, pp. 1621-1625
-
-
Hansen, P.1
Zheng, M.2
-
22
-
-
21344486039
-
The Clar number of a benzenoid hydrocarbon and linear programming
-
P. Hansen and M. Zheng, The Clar number of a benzenoid hydrocarbon and linear programming, J. Math. Chem. 15 (1994) 93-107.
-
(1994)
J. Math. Chem
, vol.15
, pp. 93-107
-
-
Hansen, P.1
Zheng, M.2
-
23
-
-
0000451607
-
Graphical properties of polyhexes: Perfect matching vector and forcing
-
F. Harary, D.J. Klein, T.P. Zivkovic, Graphical properties of polyhexes: perfect matching vector and forcing, J. Math. Chem. 6 (1991) 295-306.
-
(1991)
J. Math. Chem
, vol.6
, pp. 295-306
-
-
Harary, F.1
Klein, D.J.2
Zivkovic, T.P.3
-
24
-
-
33947085335
-
Resonance energies of aromatic hydrocarbons. Quantitative test of resonance theory
-
W.C. Herndon, Resonance energies of aromatic hydrocarbons. Quantitative test of resonance theory, J. Am. Chem. Soc. 95 (7) (1973) 2404-2406.
-
(1973)
J. Am. Chem. Soc
, vol.95
, Issue.7
, pp. 2404-2406
-
-
Herndon, W.C.1
-
25
-
-
0027307318
-
Fibonacci cubes - A new interconnection topology
-
W.-J. Hsu, Fibonacci cubes - A new interconnection topology, IEEE Trans. Parallel Distr. Systems 4 (1993) 3-12.
-
(1993)
IEEE Trans. Parallel Distr. Systems
, vol.4
, pp. 3-12
-
-
Hsu, W.-J.1
-
26
-
-
24344455092
-
Fibonacci cubes - A class of self-similar graphs
-
W.-J. Hsu, C.V. Page, J.-S. Liu, Fibonacci cubes - A class of self-similar graphs, Fibonacci Quart. 31 (1993) 65-72.
-
(1993)
Fibonacci Quart
, vol.31
, pp. 65-72
-
-
Hsu, W.-J.1
Page, C.V.2
Liu, J.-S.3
-
28
-
-
0348084915
-
The lattice structure of flow in planar graphs
-
S. Khuller, J. Naor, P. Klein, The lattice structure of flow in planar graphs, SIAM J. Discrete Math. 6(3) (1993) 477-490.
-
(1993)
SIAM J. Discrete Math
, vol.6
, Issue.3
, pp. 477-490
-
-
Khuller, S.1
Naor, J.2
Klein, P.3
-
29
-
-
0344629308
-
On resonance graphs of catacondensed hexagonal graphs: Structure, coding, and Hamiltonian path algorithm
-
S. Klavžar, A. Vesel, P. Žigert. On resonance graphs of catacondensed hexagonal graphs: structure, coding, and Hamiltonian path algorithm, MATCH Commun. Math. Comput. Chem. 49 (2003) 99-116.
-
(2003)
MATCH Commun. Math. Comput. Chem
, vol.49
, pp. 99-116
-
-
Klavžar, S.1
Vesel, A.2
Žigert, P.3
-
30
-
-
0034740048
-
Binary coding of Kekulé structures of catacondensed benzenoid hydrocarbons
-
S. Klavžar, A. Vesel, P. Žigert, I. Gutman, Binary coding of Kekulé structures of catacondensed benzenoid hydrocarbons, Comput. Chem. 25 (2001) 569-575.
-
(2001)
Comput. Chem
, vol.25
, pp. 569-575
-
-
Klavžar, S.1
Vesel, A.2
Žigert, P.3
Gutman, I.4
-
31
-
-
24344455497
-
Fibonacci cubes are the resonance graphs of fibonaccenes
-
S. Klavžar, P. Žigert, Fibonacci cubes are the resonance graphs of fibonaccenes, Fibonacci Quart. 43 (3) (2005) 269-276.
-
(2005)
Fibonacci Quart
, vol.43
, Issue.3
, pp. 269-276
-
-
Klavžar, S.1
Žigert, P.2
-
32
-
-
31244437436
-
A min-max result on catacondensed benzenoid graphs
-
S. Klavžar, P. Žigert, A min-max result on catacondensed benzenoid graphs, Appl. Math. Lett. 15 (2002) 279-283
-
(2002)
Appl. Math. Lett
, vol.15
, pp. 279-283
-
-
Klavžar, S.1
Žigert, P.2
-
33
-
-
31244433797
-
Resonance graphs of catacondensed even ring systems are median
-
S. Klavžar, P. Žigert, G. Brinkmann, Resonance graphs of catacondensed even ring systems are median, Discrete Math. 253 (2002) 35-43.
-
(2002)
Discrete Math
, vol.253
, pp. 35-43
-
-
Klavžar, S.1
Žigert, P.2
Brinkmann, G.3
-
36
-
-
33846536295
-
Resonance graphs and a binary coding for the 1-factors of benzenoid systems
-
Preprint
-
P.C.B. Lam, W.C. Shiu, H. Zhang, Resonance graphs and a binary coding for the 1-factors of benzenoid systems, Preprint, 2004.
-
(2004)
-
-
Lam, P.C.B.1
Shiu, W.C.2
Zhang, H.3
-
37
-
-
1642541667
-
A distributive lattice on the set of perfect matchings of a plane bipartite graph
-
P.C.B. Lam, H. Zhang, A distributive lattice on the set of perfect matchings of a plane bipartite graph, Order 20 (2003) 13-29.
-
(2003)
Order
, vol.20
, pp. 13-29
-
-
Lam, P.C.B.1
Zhang, H.2
-
38
-
-
33846498583
-
-
North-Holland, Amsterdam
-
L. Lovász, M. D. Plummer, Matching Theory, Annals of Discrete Math. 29, North-Holland, Amsterdam, 1986.
-
(1986)
Matching Theory, Annals of Discrete Math
, vol.29
-
-
Lovász, L.1
Plummer, M.D.2
-
39
-
-
0042531834
-
On reorienting graphs by pushing down maximal vertices. II
-
O. Pretzel, On reorienting graphs by pushing down maximal vertices. II, Discrete Math. 270 (2003) 227-240.
-
(2003)
Discrete Math
, vol.270
, pp. 227-240
-
-
Pretzel, O.1
-
41
-
-
33846538674
-
-
W. R. Pulleyblank, Polyhedral combinatorics, in: Mathematical Programming, The State of the Art, A. Bachem, M. Grotschel and B. Korte, Eds., Springer-Verlag, Berlin, 1983, pp.312-345.
-
W. R. Pulleyblank, Polyhedral combinatorics, in: Mathematical Programming, The State of the Art, A. Bachem, M. Grotschel and B. Korte, Eds., Springer-Verlag, Berlin, 1983, pp.312-345.
-
-
-
-
42
-
-
0141789719
-
Aromaticity of polycyclic conjugated hydrocarbons
-
M. Randić, Aromaticity of polycyclic conjugated hydrocarbons, Chem. Reviews 103 (9) (2003) 3449-3605.
-
(2003)
Chem. Reviews
, vol.103
, Issue.9
, pp. 3449-3605
-
-
Randić, M.1
-
43
-
-
0000181826
-
Resonance in catacondensed benzenoid hydrocarbons
-
M. Randić, Resonance in catacondensed benzenoid hydrocarbons, Int. J. Quantum Chem. 63(2) (1997) 585-600.
-
(1997)
Int. J. Quantum Chem
, vol.63
, Issue.2
, pp. 585-600
-
-
Randić, M.1
-
44
-
-
0001110986
-
Resonance in large benzenoid hydrocarbons
-
M. Randić, D.J. Klein, S. El-Basil, P. Calkins, Resonance in large benzenoid hydrocarbons, Croat. Chem. Acta 69 (4) (1996) 1639-1660.
-
(1996)
Croat. Chem. Acta
, vol.69
, Issue.4
, pp. 1639-1660
-
-
Randić, M.1
Klein, D.J.2
El-Basil, S.3
Calkins, P.4
-
45
-
-
33645881359
-
On the role of hypercubes in the resonance graphs of benzenoid graphs
-
K. Salem, S. Klavžar, I. Gutman, On the role of hypercubes in the resonance graphs of benzenoid graphs, Discrete Math. 306 (2006) 699-704.
-
(2006)
Discrete Math
, vol.306
, pp. 699-704
-
-
Salem, K.1
Klavžar, S.2
Gutman, I.3
-
47
-
-
0141831726
-
Normal components, Kekulé patterns, and Clar patterns in plane bipartite graphs
-
W.C. Shiu, P.C.B. Lam, F. Zhang, H. Zhang, Normal components, Kekulé patterns, and Clar patterns in plane bipartite graphs, J. Math. Chem. 31(4) (2002) 405-420.
-
(2002)
J. Math. Chem
, vol.31
, Issue.4
, pp. 405-420
-
-
Shiu, W.C.1
Lam, P.C.B.2
Zhang, F.3
Zhang, H.4
-
48
-
-
0003652674
-
-
Wadsworth, Belmont, CA
-
P. R. Stanley, Enumerative Combinatorics, Volume 1, Wadsworth, Belmont, CA, 1986.
-
(1986)
Enumerative Combinatorics
, vol.1
-
-
Stanley, P.R.1
-
49
-
-
27544483171
-
Characterization of resonance graphs of catacondensed hexagonal graphs
-
A. Vesel, Characterization of resonance graphs of catacondensed hexagonal graphs, MATCH Commun. Math. Comput. Chem. 53 (2005) 195-208.
-
(2005)
MATCH Commun. Math. Comput. Chem
, vol.53
, pp. 195-208
-
-
Vesel, A.1
-
50
-
-
0038889448
-
The connectivity of a class of transformation graphs
-
D. Wang, The connectivity of a class of transformation graphs, J. Mah. Study 29(2) (1996) 76-80.
-
(1996)
J. Mah. Study
, vol.29
, Issue.2
, pp. 76-80
-
-
Wang, D.1
-
51
-
-
0000238526
-
When each hexagon of a hexagonal system covers it
-
F. Zhang and R. Chen, When each hexagon of a hexagonal system covers it, Discrete Appl. Math. 30 (1991) 63-75.
-
(1991)
Discrete Appl. Math
, vol.30
, pp. 63-75
-
-
Zhang, F.1
Chen, R.2
-
52
-
-
33846466639
-
-
F. Zhang, X. Guo, The classification of hexagonal systems by their Z-transformation graphs, J. Xinjiang Univ. Natur. Sci. 4 (1987) 7-12. (Chinese)
-
F. Zhang, X. Guo, The classification of hexagonal systems by their Z-transformation graphs, J. Xinjiang Univ. Natur. Sci. 4 (1987) 7-12. (Chinese)
-
-
-
-
53
-
-
0344839289
-
The enumeration of several classes of hexagonal systems
-
F. Zhang, X. Guo, The enumeration of several classes of hexagonal systems. Acta Math. Appl. Sinica (English Ser.) 15 (1999) 65-71.
-
(1999)
Acta Math. Appl. Sinica (English Ser.)
, vol.15
, pp. 65-71
-
-
Zhang, F.1
Guo, X.2
-
54
-
-
45449124731
-
Z-transformation graph of perfect matchings of hexagonal systems
-
F. Zhang, X. Guo, R. Chen, Z-transformation graph of perfect matchings of hexagonal systems, Discrete Math. 72 (1988) 405-415.
-
(1988)
Discrete Math
, vol.72
, pp. 405-415
-
-
Zhang, F.1
Guo, X.2
Chen, R.3
-
55
-
-
0002222207
-
The connectivity of Z-transformation graphs of perfect matchings of hexagonal systems
-
F. Zhang, X. Guo, R. Chen, The connectivity of Z-transformation graphs of perfect matchings of hexagonal systems. Acta Math. Appl. Sinica 4(2)(1988) 131-135.
-
(1988)
Acta Math. Appl. Sinica
, vol.4
, Issue.2
, pp. 131-135
-
-
Zhang, F.1
Guo, X.2
Chen, R.3
-
56
-
-
33846421893
-
-
F. Zhang, X. Li, Forcing bonds of a benzenoid system, Acta Math. Appl. Sinica., Engl. Ser. 12(2) (1996) 209-215.
-
F. Zhang, X. Li, Forcing bonds of a benzenoid system, Acta Math. Appl. Sinica., Engl. Ser. 12(2) (1996) 209-215.
-
-
-
-
57
-
-
0039526346
-
Hexagonal systems with forcing edges
-
F. Zhang, X. Li, Hexagonal systems with forcing edges, Discrete Math. 140 (1995) 253-263.
-
(1995)
Discrete Math
, vol.140
, pp. 253-263
-
-
Zhang, F.1
Li, X.2
-
58
-
-
0141618907
-
Hexagonal systems with fixed bonds
-
F. Zhang, X. Li, H. Zhang, Hexagonal systems with fixed bonds, Discrete Appl. Math. 47(3) (1993) 285-296.
-
(1993)
Discrete Appl. Math
, vol.47
, Issue.3
, pp. 285-296
-
-
Zhang, F.1
Li, X.2
Zhang, H.3
-
59
-
-
0142034583
-
A new enumeration method for Kekulé structures of hexagonal systems with forcing edges
-
F. Zhang, H. Zhang, A new enumeration method for Kekulé structures of hexagonal systems with forcing edges, J. Mol. Struct. (Theochem) 331 (1995) 255-260.
-
(1995)
J. Mol. Struct. (Theochem)
, vol.331
, pp. 255-260
-
-
Zhang, F.1
Zhang, H.2
-
60
-
-
0242264220
-
Estimation of the resonance energy of benzenoid hydrocarbon
-
F. Zhang, Y. Liu, Estimation of the resonance energy of benzenoid hydrocarbon, Chinese Science Bulletin 38 (1993) 2040-2043.
-
(1993)
Chinese Science Bulletin
, vol.38
, pp. 2040-2043
-
-
Zhang, F.1
Liu, Y.2
-
61
-
-
44049120691
-
Generalized hexagonal systems with each hexagon being resonant
-
F. Zhang, M. Zheng, Generalized hexagonal systems with each hexagon being resonant, Discrete Appl. Math. 36 (1992) 67-73.
-
(1992)
Discrete Appl. Math
, vol.36
, pp. 67-73
-
-
Zhang, F.1
Zheng, M.2
-
62
-
-
0012956930
-
The connectivity of Z-transformation graphs of perfect matchings of polyominoes
-
H. Zhang, The connectivity of Z-transformation graphs of perfect matchings of polyominoes, Discrete Math. 158 (1996) 257-272.
-
(1996)
Discrete Math
, vol.158
, pp. 257-272
-
-
Zhang, H.1
-
63
-
-
69649087342
-
Direct sum of distributive lattices on the set of perfect matchings of a plane bipartite graph
-
Preprint
-
H. Zhang, Direct sum of distributive lattices on the set of perfect matchings of a plane bipartite graph, Preprint.
-
-
-
Zhang, H.1
-
64
-
-
33846466064
-
Decomposition theorem on matchable distributive lattices
-
preprint
-
H. Zhang, D. Yang, H. Yao, Decomposition theorem on matchable distributive lattices, preprint, 2005.
-
(2005)
-
-
Zhang, H.1
Yang, D.2
Yao, H.3
-
65
-
-
33750056988
-
A min-max result on outerplane bipartite graphs
-
in press
-
H. Zhang, H. Yao, D. Yang, A min-max result on outerplane bipartite graphs, Appl. Math. Lett., in press.
-
Appl. Math. Lett
-
-
Zhang, H.1
Yao, H.2
Yang, D.3
-
66
-
-
0242303665
-
Z-transformation graphs of maximum matchings of plane bipartite graphs
-
H. Zhang, R. Zha, H. Yao, Z-transformation graphs of maximum matchings of plane bipartite graphs, Discrete Appl. Math., 134 (2004) 339-350.
-
(2004)
Discrete Appl. Math
, vol.134
, pp. 339-350
-
-
Zhang, H.1
Zha, R.2
Yao, H.3
-
67
-
-
0041875856
-
The rotation graphs of perfect matchings of plane bipartite graphs
-
H. Zhang, F. Zhang, The rotation graphs of perfect matchings of plane bipartite graphs, Discrete Appl. Math. 73 (1997) 5-12.
-
(1997)
Discrete Appl. Math
, vol.73
, pp. 5-12
-
-
Zhang, H.1
Zhang, F.2
-
68
-
-
0040712547
-
Block graphs of Z-transformation graphs of perfect matchings of plane elementary bipartite graphs
-
H. Zhang, F. Zhang, Block graphs of Z-transformation graphs of perfect matchings of plane elementary bipartite graphs, Ars Combin. 53 (1999) 309-314.
-
(1999)
Ars Combin
, vol.53
, pp. 309-314
-
-
Zhang, H.1
Zhang, F.2
-
69
-
-
33846556251
-
Total Z-transformation graph of perfect matchings of plane bipartite graph
-
H. Zhang, F. Zhang, Total Z-transformation graph of perfect matchings of plane bipartite graph, Electronic Notes in Discrete Math. Vol. 5(2000).
-
(2000)
Electronic Notes in Discrete Math
, vol.5
-
-
Zhang, H.1
Zhang, F.2
-
70
-
-
0041908394
-
Plane elementary bipartite graphs
-
H. Zhang, F. Zhang, Plane elementary bipartite graphs, Discrete Appl. Math. 105 (2000) 291-311.
-
(2000)
Discrete Appl. Math
, vol.105
, pp. 291-311
-
-
Zhang, H.1
Zhang, F.2
-
71
-
-
0038241354
-
Perfect matchings of polyomino graphs
-
H. Zhang, F. Zhang, Perfect matchings of polyomino graphs, Graphs Combin. 13 (1997) 295-304.
-
(1997)
Graphs Combin
, vol.13
, pp. 295-304
-
-
Zhang, H.1
Zhang, F.2
-
72
-
-
0347415775
-
Z-transformation graphs of perfect matchings of plane bipartite graphs
-
H. Zhang, F. Zhang, H. Yao, Z-transformation graphs of perfect matchings of plane bipartite graphs, Discrete Math. 276 (2004) 393-404.
-
(2004)
Discrete Math
, vol.276
, pp. 393-404
-
-
Zhang, H.1
Zhang, F.2
Yao, H.3
-
73
-
-
7444249658
-
The Z-transformation graph for an outerplane bipartite graph has a Hamilton path
-
H. Zhang, L. Zhao, H. Yao, The Z-transformation graph for an outerplane bipartite graph has a Hamilton path, Appl. Math. Lett. 17/8 (2004) 897-901.
-
(2004)
Appl. Math. Lett
, vol.17
, Issue.8
, pp. 897-901
-
-
Zhang, H.1
Zhao, L.2
Yao, H.3
-
74
-
-
33846558051
-
Z-transformation graph of perfect matchings of catacondensed hexagonal system
-
L. Zhang, Z-transformation graph of perfect matchings of catacondensed hexagonal system, J. Mah. Study 31(4) (1998) 437-441.
-
(1998)
J. Mah. Study
, vol.31
, Issue.4
, pp. 437-441
-
-
Zhang, L.1
|