TY - JOUR AU - R. K. Gazizov AU - A. A. Gainetdinova TI - Operator of invariant differentiation and its application for integrating systems of ordinary differential equations JO - Ufa mathematical journal PY - 2017 SP - 12 EP - 21 VL - 9 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/UFA_2017_9_4_a1/ LA - en ID - UFA_2017_9_4_a1 ER -