@article{SM_2000_191_3_a3,
     author = {P. E. Zhidkov},
     title = {Riesz basis property of the~system of eigenfunctions for a~non-linear problem of {Sturm--Liouville} type},
     journal = {Sbornik. Mathematics},
     pages = {359--368},
     publisher = {mathdoc},
     volume = {191},
     number = {3},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2000_191_3_a3/}
}