@article{DE_1989_25_11_a21,
     author = {M. V. Fedoryuk},
     title = {Diffraction of waves by a tri-axial ellipsoid},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1990--1995},
     year = {1989},
     volume = {25},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_11_a21/}
}