Formal Groups, Elliptic Curves, and Some Theorems of Couveignes.

Antonia W. Bluher Formal Groups, Elliptic Curves, and Some Theorems of Couveignes. 482-501 http://dx.doi.org/10.1007/BFb0054887 1998 conf/ants/1998 ANTS db/conf/ants/ants1998.html#Bluher98