@article{ Solr-acta13994, title = {Equivalence of a problem of set theory to a hypothesis concerning the powers of cardinal "numbers To Professor Béla Szőkefalvi-Nagy on his 50th birthday}, series = {Acta scientiarum mathematicarum}, author = {Fodor György}, year = {1963}, url = {http://acta.bibl.u-szeged.hu/13994/1/math_024_fasc_001_002_152-156.pdf} }