TY - JOUR AU - N. S. Kukushkin TI - A new sufficient condition for the existence of equilibrium in the JO - Doklady Akademii Nauk PY - 1993 SP - 674 EP - 676 VL - 331 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1993_331_6_a5/ LA - ru ID - DAN_1993_331_6_a5 ER -