@article{GDZPPN002318385,
title = {Atkin-Lehner Operators.},
journal = {Mathematische Annalen},
volume = {243},
year = {1979},
pages = {121-124},
zbl = {0405.10020},
url = {http://dml.mathdoc.fr/item/GDZPPN002318385}
}
Flath, Daniel. Atkin-Lehner Operators.. Mathematische Annalen, Tome 243 (1979) pp. 121-124. http://gdmltest.u-ga.fr/item/GDZPPN002318385/