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@article{SF_1985__32_134778, author = {P.S. Venkatesan}, title = {Certain subsemigroups of orthodox semigroups.}, journal = {Semigroup forum}, pages = {183--188}, publisher = {mathdoc}, volume = {32}, year = {1985}, zbl = {0571.20060}, url = {http://geodesic.mathdoc.fr/item/SF_1985__32_134778/} }
P.S. Venkatesan. Certain subsemigroups of orthodox semigroups.. Semigroup forum, Tome 32 (1985), pp. 183-188. http://geodesic.mathdoc.fr/item/SF_1985__32_134778/