TY - JOUR AU - S. P. Novikov AU - P. G. Grinevich TI - Spectral theory of commuting operators of rank two with periodic coefficients JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 1982 SP - 25 EP - 26 VL - 16 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_1982_16_1_a3/ LA - ru ID - FAA_1982_16_1_a3 ER -