TY - JOUR AU - M. S. Agranovich TI - Spectral properties of elliptic pseudodifferential operators on a closed curve JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 1979 SP - 54 EP - 56 VL - 13 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_1979_13_4_a6/ LA - ru ID - FAA_1979_13_4_a6 ER -