@article{DAN_1970_193_3_a3,
     author = {M. M. Glukhov},
     title = {Free products and algorithmic problems in $R$-varieties of universal algebras},
     journal = {Doklady Akademii Nauk},
     pages = {514--517},
     year = {1970},
     volume = {193},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_193_3_a3/}
}