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@article{IVM_1993_3_a2, author = {D. A. Bredikhin}, title = {The equational theory of relation algebras with positive operations}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {23--30}, publisher = {mathdoc}, number = {3}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1993_3_a2/} }
D. A. Bredikhin. The equational theory of relation algebras with positive operations. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1993), pp. 23-30. http://geodesic.mathdoc.fr/item/IVM_1993_3_a2/