@article{GDZPPN002034816,
title = {On a functional equation for Jacobi's elliptic function cn(z; k).},
journal = {Aequationes mathematicae},
volume = {27},
year = {1984},
pages = {317-321},
zbl = {0546.33001},
url = {http://dml.mathdoc.fr/item/GDZPPN002034816}
}
Haruki, Hiroshi. On a functional equation for Jacobi's elliptic function cn(z; k).. Aequationes mathematicae, Tome 27 (1984) pp. 317-321. http://gdmltest.u-ga.fr/item/GDZPPN002034816/