@article{AA_2008_20_5_a4,
     author = {V. I. Kopeǐko},
     title = {On homotopization of the unitary $K_1$-functor},
     journal = {Algebra i analiz},
     pages = {99--108},
     publisher = {mathdoc},
     volume = {20},
     number = {5},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2008_20_5_a4/}
}