%0 Journal Article %A Z. I. Leibenzon %T Algebraic-differential transformations of linear differential operators of arbitrary order and their spectral properties applicable to the inverse problem %J Sbornik. Mathematics %D 1972 %P 425-471 %V 18 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1972_18_3_a4/ %G en %F SM_1972_18_3_a4