@article{DAN_1970_193_1_a7,
     author = {B. S. Pavlov},
     title = {Scattering theory and the ``nonphysical sheet'' for a system of ordinary differential equations},
     journal = {Doklady Akademii Nauk},
     pages = {36--39},
     publisher = {mathdoc},
     volume = {193},
     number = {1},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_193_1_a7/}
}