@article{DAN_1975_220_2_a13,
     author = {A. G. Megrabov},
     title = {Inverse problems for elliptic equations in a half-plane and a strip, and inverse problems involving scattering of plane waves by inhomogeneous layers},
     journal = {Doklady Akademii Nauk},
     pages = {315--317},
     publisher = {mathdoc},
     volume = {220},
     number = {2},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_220_2_a13/}
}