@article{AL_1982_21_2_a8,
     author = {V. V. Rybakov},
     title = {Bases of quasi-identities of finite modal algebras},
     journal = {Algebra i logika},
     pages = {219--227},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1982_21_2_a8/}
}