@article{MMO_1957_6_a4,
     author = {S. I. Adian},
     title = {Unsolvability of some algorithmic problems in the theory of groups},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {231--298},
     publisher = {mathdoc},
     volume = {6},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1957_6_a4/}
}