@article{DAN_1966_169_4_a14,
     author = {A. G. Ramm},
     title = {Spectrum of {Schr\"odinger's} operator used in the optical model of the nucleus},
     journal = {Doklady Akademii Nauk},
     pages = {799--802},
     publisher = {mathdoc},
     volume = {169},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_169_4_a14/}
}