@article{SM_1989_64_1_a8,
     author = {O. A. Plaksina},
     title = {Inverse problems of spectral analysis for {Sturm{\textendash}Liouville} operators with nonseparated boundary {conditions.~II}},
     journal = {Sbornik. Mathematics},
     pages = {141--160},
     year = {1989},
     volume = {64},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1989_64_1_a8/}
}