@article{FAA_1986_20_4_a3,
     author = {V. Ya. Ivrii and S. I. Fedorova},
     title = {Dilatation and the asymptotics of the eigenvalues of spectral problems with singularities},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {29--34},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1986_20_4_a3/}
}