@article{DAN_1965_165_6_a5,
     author = {B. M. Levitan and I. S. Sargsyan},
     title = {On the continuation of the one-dimensional {Dirac} system},
     journal = {Doklady Akademii Nauk},
     pages = {1241--1244},
     publisher = {mathdoc},
     volume = {165},
     number = {6},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_165_6_a5/}
}