@article{DE_2003_39_5_a3,
     author = {A. S. Makin},
     title = {On the {Basis} {Property} of a {System} of {Eigenfunctions} of a {Nonlinear} {Spectral} {Problem}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {612--618},
     publisher = {mathdoc},
     volume = {39},
     number = {5},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2003_39_5_a3/}
}