@article{DE_1989_25_6_a23,
     author = {I. S. Lomov},
     title = {The basis property of root functions of operators with multipoint boundary conditions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1053--1056},
     publisher = {mathdoc},
     volume = {25},
     number = {6},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_6_a23/}
}