By Valtr P.   in European Journal of Combinatorics

ISSN:0195-6698|20|1|115-121

Elsevier‎(1999)‎

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By Erdos P.   Tuza Z.   Valtr P.   in European Journal of Combinatorics

ISSN:0195-6698|17|6|519-532

Academic Press‎(1996)‎

Access to resources Favorite 9.33901