1. On chromatic number of infinite graphs;Erdős,1968
2. Partition relations for cardinal numbers;Erdős;Acta math. Acad. Sci. Hung.,1965
3. Problems and results on 3-chromatic hypergraphs and some related questions;Erdős,1975
4. Combinatorial theorems on classification of subsets of a given set;Erdős,1952
5. Intersection theorems and mod p rank of inclusion matrices;Frankl;J. Combin. Theory Ser. A,1990