@article{DAN_1961_139_5_a15,
     author = {V. D. Kukin and A. R. Frenkin},
     title = {On the construction of the scattering matrix in nonlocal theories},
     journal = {Doklady Akademii Nauk},
     pages = {1089--1092},
     publisher = {mathdoc},
     volume = {139},
     number = {5},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_139_5_a15/}
}