@article{GDZPPN002179814,
title = {Asymtotic Expansions of Oblate Spheroidal Wave Functions and their Characteristic Numbers.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {211},
year = {1962},
pages = {33-47},
zbl = {0129.28501},
url = {http://dml.mathdoc.fr/item/GDZPPN002179814}
}
Müller, H.J.W. Asymtotic Expansions of Oblate Spheroidal Wave Functions and their Characteristic Numbers.. Journal für die reine und angewandte Mathematik, Tome 211 (1962) pp. 33-47. http://gdmltest.u-ga.fr/item/GDZPPN002179814/