%0 Journal Article %A B. A. Dubrovin %T Periodic problems for the Korteweg--de Vries equation in the class of finite band potentials %J Funkcionalʹnyj analiz i ego priloženiâ %D 1975 %P 41-51 %V 9 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1975_9_3_a3/ %G ru %F FAA_1975_9_3_a3