@article{AL_1982_21_1_a1,
     author = {A. I. Valitskas},
     title = {Absence of a finite basis of quasi-identities for a},
     journal = {Algebra i logika},
     pages = {13--36},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1982_21_1_a1/}
}