%0 Journal Article %A V. I. Kopeiko %T Bass' nilpotent unitary $K_1$-group of unitary ring %J Zapiski Nauchnykh Seminarov POMI %D 2017 %P 134-157 %V 460 %U http://geodesic.mathdoc.fr/item/ZNSL_2017_460_a5/ %G ru %F ZNSL_2017_460_a5