TY - JOUR AU - È. Kh. Naziev AU - G. I. Keleinikova TI - Application of the theory of continuous transformation groups to the qualitative investigation of second order dynamical systems JO - Differencialʹnye uravneniâ PY - 1973 SP - 381 EP - 382 VL - 9 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1973_9_2_a26/ LA - ru ID - DE_1973_9_2_a26 ER -