@article{DAN_1963_152_1_a5,
     author = {Yu. N. Dnestrovskii and D. P. Kostomarov},
     title = {Eigenvalue problems for second-order equations in the case of non-linear dependence on a parameter~$\lambda$},
     journal = {Doklady Akademii Nauk},
     pages = {28--30},
     publisher = {mathdoc},
     volume = {152},
     number = {1},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_152_1_a5/}
}