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@article{JRAM_1973__258_151283, author = {Mario Petrich}, title = {Dense extensions of completely 0-simple semigroups. {I.}}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {103--125}, publisher = {mathdoc}, volume = {258}, year = {1973}, zbl = {0256.20081}, url = {http://geodesic.mathdoc.fr/item/JRAM_1973__258_151283/} }
Mario Petrich. Dense extensions of completely 0-simple semigroups. I.. Journal für die reine und angewandte Mathematik, Tome 258 (1973), pp. 103-125. http://geodesic.mathdoc.fr/item/JRAM_1973__258_151283/