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@article{SF_1992__44_1_135136, author = {J.S. Ponizovskii}, title = {On a type of matrix semigroup.}, journal = {Semigroup forum}, pages = {125--128}, publisher = {mathdoc}, volume = {44}, number = {1}, year = {1992}, language = {en}, url = {http://geodesic.mathdoc.fr/item/SF_1992__44_1_135136/} }
J.S. Ponizovskii. On a type of matrix semigroup.. Semigroup forum, Tome 44 (1992) no. 1, pp. 125-128. http://geodesic.mathdoc.fr/item/SF_1992__44_1_135136/