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@article{IVM_1970_10_a5, author = {E. S. Lyapin and A. E. Evseev}, title = {Semigroups whose subsemigroups are all unit ideal}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {44--48}, publisher = {mathdoc}, number = {10}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1970_10_a5/} }
E. S. Lyapin; A. E. Evseev. Semigroups whose subsemigroups are all unit ideal. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (1970), pp. 44-48. http://geodesic.mathdoc.fr/item/IVM_1970_10_a5/