@article{AL_2015_54_3_a4,
     author = {M. V. Schwidefsky},
     title = {Complexity of quasivariety lattices},
     journal = {Algebra i logika},
     pages = {381--398},
     publisher = {mathdoc},
     volume = {54},
     number = {3},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2015_54_3_a4/}
}