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@article{SF_1977__14_186382, author = {F.W. Roush and K.H. Kim}, title = {On generating regular elements in the semigroup of binary relations.}, journal = {Semigroup forum}, pages = {29--32}, publisher = {mathdoc}, volume = {14}, year = {1977}, zbl = {0356.20055}, url = {http://geodesic.mathdoc.fr/item/SF_1977__14_186382/} }
F.W. Roush; K.H. Kim. On generating regular elements in the semigroup of binary relations.. Semigroup forum, Tome 14 (1977), pp. 29-32. http://geodesic.mathdoc.fr/item/SF_1977__14_186382/