TY - JOUR AU - V. N. Orlov AU - O. A. Kovalchuk TI - Exact boundaries for the analytical approximate solution of~a~class of first-order nonlinear JO - Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences PY - 2021 SP - 381 EP - 392 VL - 25 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VSGTU_2021_25_2_a8/ LA - en ID - VSGTU_2021_25_2_a8 ER -