TY - JOUR AU - A. M. Denisov TI - The problem of determining a nonlinear coefficient in a system of partial differential equations JO - Differencialʹnye uravneniâ PY - 1999 SP - 926 EP - 934 VL - 35 IS - 7 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1999_35_7_a7/ LA - ru ID - DE_1999_35_7_a7 ER -