@article{DAN_1969_188_2_a4,
     author = {R. I. Kachurovskii},
     title = {Regular points, spectrum and eigenfunctions of nonlinear operators},
     journal = {Doklady Akademii Nauk},
     pages = {274--277},
     publisher = {mathdoc},
     volume = {188},
     number = {2},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_188_2_a4/}
}