TY - JOUR AU - Yu. S. Èmanuilov TI - Existence theorems for control problems of singular systems with distributed parameters JO - Sbornik. Mathematics PY - 1991 SP - 341 EP - 355 VL - 69 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1991_69_2_a1/ LA - en ID - SM_1991_69_2_a1 ER -