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@article{SF_1974__6_133962, author = {B.M. Schein}, title = {Bands of unipotent monoids.}, journal = {Semigroup forum}, pages = {75--79}, publisher = {mathdoc}, volume = {6}, year = {1974}, zbl = {0255.20044}, url = {http://geodesic.mathdoc.fr/item/SF_1974__6_133962/} }
B.M. Schein. Bands of unipotent monoids.. Semigroup forum, Tome 6 (1974), pp. 75-79. http://geodesic.mathdoc.fr/item/SF_1974__6_133962/