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@article{SF_1974__9_134079, author = {B.M. Schein and L.M. Gluskin}, title = {Ideal extensions of irreductive semigroups.}, journal = {Semigroup forum}, pages = {216--240}, publisher = {mathdoc}, volume = {9}, year = {1974}, zbl = {0293.20050}, url = {http://geodesic.mathdoc.fr/item/SF_1974__9_134079/} }
B.M. Schein; L.M. Gluskin. Ideal extensions of irreductive semigroups.. Semigroup forum, Tome 9 (1974), pp. 216-240. http://geodesic.mathdoc.fr/item/SF_1974__9_134079/