@article{01987648,
title = {On the derivative of hyperbolically convex functions.},
journal = {Annales Academiae Scientiarum Fennicae. Mathematica},
volume = {27},
year = {2002},
pages = {47-56},
zbl = {1021.30010},
language = {en},
url = {http://dml.mathdoc.fr/item/01987648}
}
Mejía, Diego; Pommerenke, Christian. On the derivative of hyperbolically convex functions.. Annales Academiae Scientiarum Fennicae. Mathematica, Tome 27 (2002) pp. 47-56. http://gdmltest.u-ga.fr/item/01987648/