@article{DE_1978_14_7_a13,
     author = {A. P. Makhmudov},
     title = {The property of being an unconditional basis of systems of eigenfunctions of certain quasilinear operator equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1262--1271},
     publisher = {mathdoc},
     volume = {14},
     number = {7},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_7_a13/}
}