TY - JOUR AU - A. A. Azamov AU - A. Begaliev TI - An Existence Theorem and an Approximate Solution Method for a Pfaff Equation with Continuous Coefficients JO - Trudy Instituta matematiki i mehaniki PY - 2021 SP - 12 EP - 24 VL - 27 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TIMM_2021_27_3_a1/ LA - ru ID - TIMM_2021_27_3_a1 ER -