@article{ISU_2012_12_2_a10,
     author = {V. A. Kovalev and Yu. N. Radayev},
     title = {Upper and low bounds of azimuthal numbers related to elementary wave functions of an elliptic cylinder},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {68--81},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2012_12_2_a10/}
}