%0 Journal Article %A S. P. Novikov %A P. G. Grinevich %T Spectral theory of commuting operators of rank two with periodic coefficients %J Funkcionalʹnyj analiz i ego priloženiâ %D 1982 %P 25-26 %V 16 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1982_16_1_a3/ %G ru %F FAA_1982_16_1_a3