Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1971_7_a14, author = {\`E. G. Shutov}, title = {Commutative semigroups with single element normal subsemigroups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {113--121}, publisher = {mathdoc}, number = {7}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1971_7_a14/} }
È. G. Shutov. Commutative semigroups with single element normal subsemigroups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 7 (1971), pp. 113-121. http://geodesic.mathdoc.fr/item/IVM_1971_7_a14/