TY - JOUR AU - A. A. Davydov TI - Periodic $\lambda$-rings and exponents of finite groups JO - Sbornik. Mathematics PY - 1997 SP - 1183 EP - 1190 VL - 188 IS - 8 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1997_188_8_a4/ LA - en ID - SM_1997_188_8_a4 ER -