Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1969_185_6_a15, author = {P. E. Krasnushkin}, title = {Normal wave expansion in a spherically stratified medium}, journal = {Doklady Akademii Nauk}, pages = {1262--1265}, publisher = {mathdoc}, volume = {185}, number = {6}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1969_185_6_a15/} }
P. E. Krasnushkin. Normal wave expansion in a spherically stratified medium. Doklady Akademii Nauk, Tome 185 (1969) no. 6, pp. 1262-1265. http://geodesic.mathdoc.fr/item/DAN_1969_185_6_a15/