TY - JOUR AU - L. E. Evtushik TI - Non-Euclidean geometries based on higher-order ordinary differential systems JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 1994 SP - 86 EP - 98 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_1994_2_a12/ LA - ru ID - VMUMM_1994_2_a12 ER -