TY - JOUR AU - R. E. Ginzburg TI - An application of the method of Ljapunov functions to the investigation of oscillations in nonlinear systems with lag JO - Differencialʹnye uravneniâ PY - 1971 SP - 1903 EP - 1905 VL - 7 IS - 10 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1971_7_10_a17/ LA - ru ID - DE_1971_7_10_a17 ER -