@article{GDZPPN002476509, title = {Hall's Criterion as a 'Self-Refining' Result.}, journal = {Monatshefte f\"ur Mathematik}, volume = {73}, year = {1969}, pages = {139-146}, zbl = {0199.31705}, url = {http://dml.mathdoc.fr/item/GDZPPN002476509} }
Mirsky, L. Hall's Criterion as a 'Self-Refining' Result.. Monatshefte für Mathematik, Tome 73 (1969) pp. 139-146. http://gdmltest.u-ga.fr/item/GDZPPN002476509/