@inproceedings{shou-wu1992positive,
title={Positive line bundles on arithmetic surfaces},
author={Shou-Wu Zhang},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20180715002912885032110},
booktitle={Annals of Mathematics (2)},
volume={136},
number={3},
pages={569-587},
year={1992},
}