@article{DE_1990_26_5_a1,
     author = {N. S. Bojinov},
     title = {On uniqueness and completeness theorems for expansion in eigen- and associated functions of a nonlocal {Sturm--Liouville} operator on a finite interval},
     journal = {Differencialʹnye uravneni\^a},
     pages = {741--753},
     publisher = {mathdoc},
     volume = {26},
     number = {5},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_5_a1/}
}