@article{GDZPPN002042207,
title = {Triangles III: Complex triangle functions.},
journal = {Aequationes mathematicae},
volume = {53},
year = {1997},
pages = {4-35},
zbl = {0868.51018},
url = {http://dml.mathdoc.fr/item/GDZPPN002042207}
}
Lester, June A. Triangles III: Complex triangle functions.. Aequationes mathematicae, Tome 53 (1997) pp. 4-35. http://gdmltest.u-ga.fr/item/GDZPPN002042207/