@article{GDZPPN002039389,
title = {On generalized hyperbolic functions and their characterization by functional equations.},
journal = {Aequationes mathematicae},
volume = {44},
year = {1992},
pages = {198-210},
zbl = {0755.39009},
url = {http://dml.mathdoc.fr/item/GDZPPN002039389}
}
Schwaiger, Jens. On generalized hyperbolic functions and their characterization by functional equations.. Aequationes mathematicae, Tome 44 (1992) pp. 198-210. http://gdmltest.u-ga.fr/item/GDZPPN002039389/