TY - JOUR AU - G. F. Kuliev TI - The problem of optimal control of coefficients for equations of hyperbolic type JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1985 SP - 39 EP - 44 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1985_3_a4/ LA - ru ID - IVM_1985_3_a4 ER -