@article{AL_2005_44_4_a0,
     author = {A. I. Budkin},
     title = {Quasivariety {Generated} by {Free} {Metabelian} and {2-Nilpotent} {Groups}},
     journal = {Algebra i logika},
     pages = {389--398},
     publisher = {mathdoc},
     volume = {44},
     number = {4},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2005_44_4_a0/}
}