@article{1077467631, author = {Lax, Peter D.}, title = {Asymptotic solutions of oscillatory initial value problems}, journal = {Duke Math. J.}, volume = {24}, number = {1}, year = {1957}, pages = { 627-646}, language = {en}, url = {http://dml.mathdoc.fr/item/1077467631} }
Lax, Peter D. Asymptotic solutions of oscillatory initial value problems. Duke Math. J., Tome 24 (1957) no. 1, pp. 627-646. http://gdmltest.u-ga.fr/item/1077467631/