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@article{IVM_2003_8_a9, author = {B. M. Vernikov}, title = {Quasi-identities in modular lattices of semigroup varieties}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {72--76}, publisher = {mathdoc}, number = {8}, year = {2003}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_2003_8_a9/} }
B. M. Vernikov. Quasi-identities in modular lattices of semigroup varieties. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 8 (2003), pp. 72-76. http://geodesic.mathdoc.fr/item/IVM_2003_8_a9/