@inproceedings{gerhard1975some,
title={Some remarks concerning points of finite order on elliptic curves over global fields},
author={Gerhard Frey},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203459840718260},
booktitle={Arkiv for Matematik},
volume={15},
number={1},
pages={1-19},
year={1975},
}
Gerhard Frey. Some remarks concerning points of finite order on elliptic curves over global fields. 1975. Vol. 15. In Arkiv for Matematik. pp.1-19. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203459840718260.