TY - JOUR AU - G. S. Krechetov TI - Lyapunov functions for a class of second-order autonomous systems JO - Differencialʹnye uravneniâ PY - 1988 SP - 207 EP - 211 VL - 24 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1988_24_2_a2/ LA - ru ID - DE_1988_24_2_a2 ER -