TY  - JOUR
AU  - Fulvia Skof
TI  - On two conditional forms of the equation ||f(x + y)|| = ||f(x) + f(y)||.
JO  - Aequationes mathematicae
PY  - 1993
SP  - 167
EP  - 178
VL  - 45
IS  - 2-3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1993__45_2-3_137519/
ID  - AM2_1993__45_2-3_137519
ER  -