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A Turan type problem for interval graphs. (English) Zbl 0391.05033

MSC:
05C35 Extremal problems in graph theory
05C99 Graph theory
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References:
[1] Berge, C., Graphs et hypergraphs, (1970), Dunod Paris · Zbl 0334.05117
[2] Harary, F., Graph theory, (1969), Addison-Wesley Reading, Ma · Zbl 0797.05064
[3] M. Katchalski and A. Liu, Symmetric twins and common transversals, Pacific J. Math, to appear. · Zbl 0462.52005
[4] Lekkerkekker, C.G.; Boland, J.C.H., Representation of a finite graph by a set of intervals on the real line, Fund. math., 51, 45-64, (1962) · Zbl 0105.17501
[5] Turán, P., On the theory of graphs, Colloq. math., 3, 19-30, (1954) · Zbl 0055.17004
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