@article{AL_1982_21_1_a6,
     author = {N. S. Chernikov},
     title = {Locally step groups factorizable by subgroups of finite rank},
     journal = {Algebra i logika},
     pages = {108--120},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1982_21_1_a6/}
}