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@article{IVM_1979_12_a1, author = {I. E. Benenson}, title = {The structure of quasivarieties of models}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {14--20}, publisher = {mathdoc}, number = {12}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1979_12_a1/} }
I. E. Benenson. The structure of quasivarieties of models. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 12 (1979), pp. 14-20. http://geodesic.mathdoc.fr/item/IVM_1979_12_a1/