TY - JOUR AU - N. I. Vulpe TI - Construction of a minimal complete system of orthogonal invariants for a two-dimensional system of differential equations JO - Doklady Akademii Nauk PY - 1983 SP - 1299 EP - 1302 VL - 269 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1983_269_6_a3/ LA - ru ID - DAN_1983_269_6_a3 ER -