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@article{IVM_1988_10_a1, author = {O. V. Knyazev}, title = {The groupoid of varieties of completely simple semigroups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {5--11}, publisher = {mathdoc}, number = {10}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1988_10_a1/} }
O. V. Knyazev. The groupoid of varieties of completely simple semigroups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (1988), pp. 5-11. http://geodesic.mathdoc.fr/item/IVM_1988_10_a1/