TY  - JOUR
AU  - Shinji Yamashita
TI  - Functions with H... hyperbolic derivative.
JO  - Mathematica Scandinavica
PY  - 1983
SP  - 238
EP  - 244
VL  - 53
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1983__53_166869/
ID  - MS2_1983__53_166869
ER  -