@article{SM_2005_196_2_a3,
     author = {I. M. Nikonov},
     title = {Universal {Karoubi} characteristic classes of approximately finite algebras},
     journal = {Sbornik. Mathematics},
     pages = {231--242},
     publisher = {mathdoc},
     volume = {196},
     number = {2},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2005_196_2_a3/}
}