@article{FPM_2007_13_8_a9,
     author = {I. M. Nikonov},
     title = {Universal {Karoubi's} characteristic classes of nuclear $C^*$-algebras},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {133--169},
     publisher = {mathdoc},
     volume = {13},
     number = {8},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2007_13_8_a9/}
}