@article{DAN_1960_133_2_a0,
     author = {S. I. Adian},
     title = {On the embeddability of semigroups in groups},
     journal = {Doklady Akademii Nauk},
     pages = {255--257},
     publisher = {mathdoc},
     volume = {133},
     number = {2},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_133_2_a0/}
}