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@article{MZM_1999_65_5_a6, author = {D. I. Piontkovskii}, title = {On free products in varieties of associative algebras}, journal = {Matemati\v{c}eskie zametki}, pages = {693--702}, publisher = {mathdoc}, volume = {65}, number = {5}, year = {1999}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1999_65_5_a6/} }
D. I. Piontkovskii. On free products in varieties of associative algebras. Matematičeskie zametki, Tome 65 (1999) no. 5, pp. 693-702. http://geodesic.mathdoc.fr/item/MZM_1999_65_5_a6/