@article{DAN_1970_195_5_a5,
     author = {M. A. Krasnosel'skii},
     title = {An investigation of the bifurcation of small eigenfunctions in the case of a multidimensional degeneracy},
     journal = {Doklady Akademii Nauk},
     pages = {1025--1028},
     publisher = {mathdoc},
     volume = {195},
     number = {5},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_195_5_a5/}
}