Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1971_12_a12, author = {I. I. Mel'nik}, title = {A~certain family of varieties of semigroups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {103--108}, publisher = {mathdoc}, number = {12}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1971_12_a12/} }
I. I. Mel'nik. A~certain family of varieties of semigroups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 12 (1971), pp. 103-108. http://geodesic.mathdoc.fr/item/IVM_1971_12_a12/