Richard A. Duke Hanno Lefmann Vojtech Rödl On Uncrowded Hypergraphs. 209-212 1995 6 Random Struct. Algorithms 2/3 db/journals/rsa/rsa6.html#DukeLR95 https://doi.org/10.1002/rsa.3240060208 https://www.wikidata.org/entity/Q105583243