@article{IIGUM_2012_5_4_a6,
     author = {O. E. Perminova},
     title = {On nonaxiomatizability of critical lattices class},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {66--78},
     year = {2012},
     volume = {5},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2012_5_4_a6/}
}