@article{TRSPY_1972_117_a9, author = {I. A. Kipriyanov}, title = {Asymptotic distribution of eigenvalues and eigenfunctions of a certain class of singular elliptic operators}, journal = {Informatics and Automation}, pages = {159--179}, publisher = {mathdoc}, volume = {117}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1972_117_a9/} }