@article{DE_2000_36_3_a16,
     author = {I. M. Guseinov and I. M. Nabiev},
     title = {A class of inverse problems for a quadratic pencil of {Sturm-Liouville} operators},
     journal = {Differencialʹnye uravneni\^a},
     pages = {418--420},
     publisher = {mathdoc},
     volume = {36},
     number = {3},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2000_36_3_a16/}
}