@article{DAN_1976_229_2_a8,
     author = {A. P. Makhmudov},
     title = {On the unconditional basicity of systems of eigenfunctions of some quasilinear operator equations},
     journal = {Doklady Akademii Nauk},
     pages = {296--299},
     publisher = {mathdoc},
     volume = {229},
     number = {2},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_229_2_a8/}
}