@article{AL_2006_45_1_a2,
     author = {Ch. K. Gupta and N. S. Romanovskii},
     title = {The {Word} {Problem} for {Polynilpotent} {Groups} with a {Single} {Primitive} {Defining} {Relation}},
     journal = {Algebra i logika},
     pages = {28--43},
     publisher = {mathdoc},
     volume = {45},
     number = {1},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2006_45_1_a2/}
}