Journal of Combinatorial Theory, Series B, Volume 53

Volume 53, Number 1, September 1991

• Jan Kratochvíl, Jirí Matousek:
  String graphs requiring exponential representations. 1-4
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• Hans-Jürgen Bandelt, Erwin Pesch:
  Efficient characterizations of n-chromatic absolute retracts. 5-31
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• Alexander Schrijver:
  Short proofs on multicommodity flows and cuts. 32-39
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• Gert Sabidussi:
  Clumps, minimal asymmetric graphs, and involutions. 40-79
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• Bill Jackson:
  A characterisation of graphs having three pairwise compatible Euler tours. 80-92
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• Bill Jackson:
  Supplementary Eulerian vectors in isotropic systems. 93-105
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• Brigitte Servatius:
  On the two-dimensional generic rigidity matroid and its dual. 106-113
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• J. D. Horton, I. Z. Bouwer:
  Symmetric Y-graphs and H-graphs. 114-129
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• Zhi-Cheng Gao:
  The number of rooted 2-connected triangular maps on the projective plane. 130-142
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• Noga Alon, Richard A. Brualdi, Bryan L. Shader:
  Multicolored forests in bipartite decompositions of graphs. 143-148
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Volume 53, Number 2, November 1991

• Anna Lubiw:
  A weighted min-max relation for intervals. 151-172
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• F. Bruce Shepherd:
  Hamiltonicity in claw-free graphs. 173-194
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• P. Frankl:
  Multiply-intersecting families. 195-234
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• Reinhardt Euler, Ali Ridha Mahjoub:
  On a composition of independence systems by circuit identification. 235-259
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• Wolfgang Mader:
  Ecken von kleinem Grad in kritisch n-fach zusammenhängenden Digraphen. 260-272
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• Liping Sun:
  Two classes of perfect graphs. 273-292
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• Edward A. Bender, E. Rodney Canfield:
  The number of rooted maps on an orientable surface. 293-299
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• James B. Shearer:
  A note on the independence number of triangle-free graphs, II. 300-307
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