TY - JOUR AU - N. Ya. Beznoshchenko TI - Existence of a solution of the problem of determining the coefficient~$q$ in the equation $u_t-\Delta u+qu=F$ JO - Differencialʹnye uravneniâ PY - 1979 SP - 10 EP - 17 VL - 15 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1979_15_1_a1/ LA - ru ID - DE_1979_15_1_a1 ER -