TY - JOUR AU - M. B. Karmanova TI - The area of surfaces on sub-Lorentzian structures of depth two JO - Matematičeskie trudy PY - 2023 SP - 93 EP - 119 VL - 26 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MT_2023_26_1_a4/ LA - ru ID - MT_2023_26_1_a4 ER -