TY  - JOUR
AU  - E.J. Ditters
TI  - Curves and Formal (Co) Groups.
JO  - Inventiones mathematicae
PY  - 1972
SP  - 1
EP  - 20
VL  - 17
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM_1972__17_142154/
ID  - IM_1972__17_142154
ER  -