@article{MOMA_1969__73_177457,
     author = {L. Mirsky},
     title = {Hall's {Criterion} as a {'Self-Refining'} {Result.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {139--146},
     publisher = {mathdoc},
     volume = {73},
     year = {1969},
     zbl = {0199.31705},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1969__73_177457/}
}