@article{AL_1982_21_2_a0,
     author = {S. A. Gurchenkov},
     title = {Minimal varieties of $l$-groups},
     journal = {Algebra i logika},
     pages = {131--137},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1982_21_2_a0/}
}