%0 Journal Article %A B. W. Schulze %T Potentials for higher order elliptic equations, and inverse problems %J Differencialʹnye uravneniâ %D 1976 %P 148-158 %V 12 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1976_12_1_a18/ %G ru %F DE_1976_12_1_a18