TY - JOUR AU - G. G. Gafarov TI - Symmetries and first integrals of dynamical systems JO - Differencialʹnye uravneniâ PY - 1990 SP - 531 EP - 532 VL - 26 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1990_26_3_a22/ LA - ru ID - DE_1990_26_3_a22 ER -