TY - JOUR AU - M. M. Malamud TI - Borg Type Theorems for First-Order Systems on a Finite Interval JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 1999 SP - 75 EP - 80 VL - 33 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_1999_33_1_a9/ LA - ru ID - FAA_1999_33_1_a9 ER -