TY  - JOUR
AU  - Frey, Gerhard
TI  - A remark about isogenies of elliptic curves over quadratic fields
JO  - Compositio Mathematica
PY  - 1986
SP  - 133
EP  - 134
VL  - 58
IS  - 1
PB  - Martinus Nijhoff Publishers
UR  - http://www.numdam.org/item/CM_1986__58_1_133_0/
LA  - en
ID  - CM_1986__58_1_133_0
ER  -