%0 Journal Article %A A. S. Alekseev %A A. G. Megrabov %T Inverse problems for a string with an oblique derivative condition at one end, and inverse problems of plane wave scattering on inhomogeneous layers %J Doklady Akademii Nauk %D 1974 %P 308-310 %V 219 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1974_219_2_a12/ %G ru %F DAN_1974_219_2_a12