TY - JOUR AU - G. S. Krechetov TI - Preservation of the property of stability in the presence of two zero roots and a line of equilibrium JO - Differencialʹnye uravneniâ PY - 1974 SP - 1993 EP - 2000 VL - 10 IS - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1974_10_11_a8/ LA - ru ID - DE_1974_10_11_a8 ER -