%0 Journal Article %A L. A. Pastur %A V. A. Tkachenko %T Spectral theory of Schrödinger operators with periodic complex-valued potentials %J Funkcionalʹnyj analiz i ego priloženiâ %D 1988 %P 85-86 %V 22 %N 2 %U http://geodesic.mathdoc.fr/item/FAA_1988_22_2_a19/ %G ru %F FAA_1988_22_2_a19