%0 Journal Article %A I. M. Nikonov %T An example of a nontrivial characteristic class for the group algebra $\mathbb{C}[\mathbb{Z}_3]$ %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2002 %P 58-60 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2002_4_a10/ %G ru %F VMUMM_2002_4_a10