TY - JOUR AU - V. V. Basov TI - On the stability of the equilibrium position of a system of differential equations in the critical case of two purely imaginary and two zero roots of the characteristic equation JO - Differencialʹnye uravneniâ PY - 1999 SP - 1313 EP - 1318 VL - 35 IS - 10 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1999_35_10_a1/ LA - ru ID - DE_1999_35_10_a1 ER -