@article{DAN_1996_346_5_a0,
     author = {V. A. Gorbunov},
     title = {[Quasi-]Birkhoff classes and complete homomorphic images of lattices of [quasi-]varieties},
     journal = {Doklady Akademii Nauk},
     pages = {583--586},
     year = {1996},
     volume = {346},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1996_346_5_a0/}
}