@article{DE_1989_25_4_a2,
     author = {S. A. Bespalova and Yu. A. Klokov},
     title = {A boundary value problem for fourth-order ordinary differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {573--578},
     publisher = {mathdoc},
     volume = {25},
     number = {4},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_4_a2/}
}