TY - JOUR TI - Vasilii Il'ich Nechaev (on the occasion of his 70th birthday) JO - Matematičeskie zametki PY - 1990 SP - 5 VL - 47 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1990_47_4_a0/ LA - ru ID - MZM_1990_47_4_a0 ER -