@article{MZM_2003_74_6_a3,
     author = {A. A. Vladimirov},
     title = {Estimates of the {Number} of {Eigenvalues} of {Self-Adjoint} {Operator} {Functions}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {838--847},
     publisher = {mathdoc},
     volume = {74},
     number = {6},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2003_74_6_a3/}
}