@article{AL_1996_35_5_a3,
     author = {S. V. Lenyuk},
     title = {On a lattice of quasivarieties of metabelian groups},
     journal = {Algebra i logika},
     pages = {552--561},
     year = {1996},
     volume = {35},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1996_35_5_a3/}
}