TY - JOUR AU - V. V. Basov AU - Yu. N. Bibikov TI - On the stability of the equilibrium state in a case of periodic perturbation of the center JO - Differencialʹnye uravneniâ PY - 1997 SP - 583 EP - 586 VL - 33 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1997_33_5_a1/ LA - ru ID - DE_1997_33_5_a1 ER -