@article{02096245,
title = {Belyi's theorem revisited.},
journal = {Beitr\"age zur Algebra und Geometrie},
volume = {45},
year = {2004},
pages = {253-265},
zbl = {1060.14040},
language = {en},
url = {http://dml.mathdoc.fr/item/02096245}
}
Köck, Bernhard. Belyi's theorem revisited.. Beiträge zur Algebra und Geometrie, Tome 45 (2004) pp. 253-265. http://gdmltest.u-ga.fr/item/02096245/