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@article{SF_1978__16_134277, author = {H.J. Weinert}, title = {On left, right and two-sided cancellable elements of semigroups.}, journal = {Semigroup forum}, pages = {97--104}, publisher = {mathdoc}, volume = {16}, year = {1978}, zbl = {0387.20055}, url = {http://geodesic.mathdoc.fr/item/SF_1978__16_134277/} }
H.J. Weinert. On left, right and two-sided cancellable elements of semigroups.. Semigroup forum, Tome 16 (1978), pp. 97-104. http://geodesic.mathdoc.fr/item/SF_1978__16_134277/