TY  - JOUR
AU  - Alessandro Perotti
TI  - A differential criterium for regularity of quaternionic functions
JO  - Comptes Rendus. Mathématique
PY  - 2003
SP  - 89
EP  - 92
VL  - 337
IS  - 2
PB  - Elsevier
DO  - 10.1016/S1631-073X(03)00284-X
LA  - en
ID  - CRMATH_2003__337_2_89_0
ER  -