@article{DAN_1963_149_2_a2,
     author = {A. P. Biryukov},
     title = {Semigroups which are prescribed by identities},
     journal = {Doklady Akademii Nauk},
     pages = {230--232},
     publisher = {mathdoc},
     volume = {149},
     number = {2},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_149_2_a2/}
}