TY - JOUR AU - I. V. Rakhmelevich TI - Multi-dimensional second-order differentialequations with quadratic form on the first derivatives JO - Matematičeskie zametki SVFU PY - 2022 SP - 56 EP - 68 VL - 29 IS - 1 UR - http://geodesic.mathdoc.fr/item/SVFU_2022_29_1_a4/ LA - ru ID - SVFU_2022_29_1_a4 ER -