@article{1102945112, author = {Sribala, S.}, title = {On $\Sigma $-inverse semigroups.}, journal = {Pacific J. Math.}, volume = {49}, number = {2}, year = {1973}, pages = { 483-488}, language = {en}, url = {http://dml.mathdoc.fr/item/1102945112} }
Sribala, S. On $\Sigma $-inverse semigroups.. Pacific J. Math., Tome 49 (1973) no. 2, pp. 483-488. http://gdmltest.u-ga.fr/item/1102945112/