%0 Journal Article %A A. A. Davydov %T Periodic $\lambda$-rings and exponents of finite groups %J Sbornik. Mathematics %D 1997 %P 1183-1190 %V 188 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1997_188_8_a4/ %G en %F SM_1997_188_8_a4