@article{AA_1993_5_6_a4,
     author = {A. E. Zalesskii and M. B. Smirnov},
     title = {On identities in graded algebras},
     journal = {Algebra i analiz},
     pages = {116--120},
     publisher = {mathdoc},
     volume = {5},
     number = {6},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1993_5_6_a4/}
}