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@article{IVM_1988_1_a5, author = {T. A. Martynova}, title = {The product of varieties of semigroups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {36--41}, publisher = {mathdoc}, number = {1}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1988_1_a5/} }
T. A. Martynova. The product of varieties of semigroups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1988), pp. 36-41. http://geodesic.mathdoc.fr/item/IVM_1988_1_a5/