Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1978__14_2_a1, author = {Hsieh, Po Fang}, title = {On asymptotic integrations of $x^2y''-P(x)y=0$}, journal = {Archivum mathematicum}, pages = {75--83}, publisher = {mathdoc}, volume = {14}, number = {2}, year = {1978}, mrnumber = {512747}, zbl = {0409.34010}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1978__14_2_a1/} }
Hsieh, Po Fang. On asymptotic integrations of $x^2y''-P(x)y=0$. Archivum mathematicum, Tome 14 (1978) no. 2, pp. 75-83. http://geodesic.mathdoc.fr/item/ARM_1978__14_2_a1/