@article{SM_1971_14_3_a0,
     author = {M. M. Glukhov},
     title = {On free expansions and algorithmic problems in $R$-varieties of universal algebras},
     journal = {Sbornik. Mathematics},
     pages = {297--328},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1971_14_3_a0/}
}