@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/}
}