@article{DAN_1962_144_4_a16,
     author = {D. Ya. Petrina},
     title = {Analytical properties of partial waves of scattering amplitude in excitation theory},
     journal = {Doklady Akademii Nauk},
     pages = {755--758},
     publisher = {mathdoc},
     volume = {144},
     number = {4},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_144_4_a16/}
}