@article{DE_2006_42_12_a5,
     author = {A. S. Makin},
     title = {On the basis property of systems of root functions of regular boundary value problems for the {Sturm--Liouville} operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1646--1656},
     publisher = {mathdoc},
     volume = {42},
     number = {12},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2006_42_12_a5/}
}