@article{MOMA_1981__91_178011,
     author = {Boris M. Schein},
     title = {Pseudosimple {Commutative} {Semigroups.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {77--78},
     publisher = {mathdoc},
     volume = {91},
     year = {1981},
     zbl = {0447.20047},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1981__91_178011/}
}