@article{TMF_1970_4_3_a4,
     author = {V. I. Savrin and N. E. Tyurin and O. A. Khrustalev},
     title = {Second {Born} approximation for the phase of scattering by smooth potentials},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {322--327},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1970_4_3_a4/}
}