TY - JOUR AU - A. M. Khludnev TI - Limit transitions in optimal control problems for a fourth-order operator JO - Differencialʹnye uravneniâ PY - 1989 SP - 1427 EP - 1435 VL - 25 IS - 8 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1989_25_8_a18/ LA - ru ID - DE_1989_25_8_a18 ER -