@article{ZNSL_1976_56_a11,
     author = {B. A. Ivanov},
     title = {Some properties of eigenvalues of positive operators nonlinearly depend on a~parameter},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {177--181},
     publisher = {mathdoc},
     volume = {56},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1976_56_a11/}
}