@article{AL_2011_50_1_a0,
     author = {Ch. K. Gupta and E. I. Timoshenko},
     title = {Universal theories for partially commutative metabelian groups},
     journal = {Algebra i logika},
     pages = {3--25},
     year = {2011},
     volume = {50},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2011_50_1_a0/}
}