@article{DAN_1980_255_2_a4,
     author = {M. A. Krasnosel'skii and \`E. M. Muhamadiev and A. V. Pokrovskii},
     title = {Bifurcation values of parameters in variational problems},
     journal = {Doklady Akademii Nauk},
     pages = {282--286},
     publisher = {mathdoc},
     volume = {255},
     number = {2},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_255_2_a4/}
}