@inproceedings{margarida2007on,
title={On the algebraic fundamental group of surfaces with $K^2\leq 3\chi $},
author={Margarida Mendes Lopes, and Rita Pardini},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160909100753262432695},
booktitle={Journal of Differential Geometry},
volume={77},
number={2},
pages={189-199},
year={2007},
}
Margarida Mendes Lopes, and Rita Pardini. On the algebraic fundamental group of surfaces with $K^2\leq 3\chi $. 2007. Vol. 77. In Journal of Differential Geometry. pp.189-199. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160909100753262432695.