@article{DAN_1987_293_5_a6,
     author = {V. L. Murskii},
     title = {On the proportion of closed classes without a finite basis of identities},
     journal = {Doklady Akademii Nauk},
     pages = {1054--1057},
     publisher = {mathdoc},
     volume = {293},
     number = {5},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_293_5_a6/}
}