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@article{AL_1979_18_1_a3, author = {E. A. Palyutin}, title = {Categorical positive {Horn} theories}, journal = {Algebra i logika}, pages = {47--72}, publisher = {mathdoc}, volume = {18}, number = {1}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1979_18_1_a3/} }
E. A. Palyutin. Categorical positive Horn theories. Algebra i logika, Tome 18 (1979) no. 1, pp. 47-72. http://geodesic.mathdoc.fr/item/AL_1979_18_1_a3/