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@article{DAN_1972_204_1_a0, author = {M. S. Burgin}, title = {Free topological groups and universal algebras}, journal = {Doklady Akademii Nauk}, pages = {9--11}, publisher = {mathdoc}, volume = {204}, number = {1}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1972_204_1_a0/} }
M. S. Burgin. Free topological groups and universal algebras. Doklady Akademii Nauk, Tome 204 (1972) no. 1, pp. 9-11. http://geodesic.mathdoc.fr/item/DAN_1972_204_1_a0/