@article{DE_1989_25_7_a1,
     author = {I. M. Guseinov and I. M. Nabiev},
     title = {A class of inverse boundary value problems for {Sturm--Liouville} operators},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1114--1120},
     publisher = {mathdoc},
     volume = {25},
     number = {7},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_7_a1/}
}