@article{SF_1971__3_133849,
     author = {B.M. Schein},
     title = {A note on radicals in regular semigroups.},
     journal = {Semigroup forum},
     pages = {84--85},
     publisher = {mathdoc},
     volume = {3},
     year = {1971},
     zbl = {0237.20056},
     url = {http://geodesic.mathdoc.fr/item/SF_1971__3_133849/}
}