@article{SF_1971__3_133848,
     author = {B.M. Schein},
     title = {A remark concerning congruences on [0,-] bisimple inverse semigroups.},
     journal = {Semigroup forum},
     pages = {80--83},
     publisher = {mathdoc},
     volume = {3},
     year = {1971},
     zbl = {0237.20057},
     url = {http://geodesic.mathdoc.fr/item/SF_1971__3_133848/}
}