@article{106994, author = {Po Fang Hsieh}, title = {On asymptotic integrations of $x^2y''-P(x)y=0$}, journal = {Archivum Mathematicum}, volume = {014}, year = {1978}, pages = {75-83}, zbl = {0409.34010}, mrnumber = {512747}, language = {en}, url = {http://dml.mathdoc.fr/item/106994} }
Hsieh, Po Fang. On asymptotic integrations of $x^2y''-P(x)y=0$. Archivum Mathematicum, Tome 014 (1978) pp. 75-83. http://gdmltest.u-ga.fr/item/106994/
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