@inproceedings{tráng1981the,
title={The local$Π$_{1}of the complement of a hypersurface with normal crossings in codimension 1 is abelianof the complement of a hypersurface with normal crossings in codimension 1 is abelian},
author={Tráng Lê Dũng, and K. Saito},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203516342444401},
booktitle={Arkiv for Matematik},
volume={22},
number={1},
pages={1-24},
year={1981},
}
Tráng Lê Dũng, and K. Saito. The local$Π$_{1}of the complement of a hypersurface with normal crossings in codimension 1 is abelianof the complement of a hypersurface with normal crossings in codimension 1 is abelian. 1981. Vol. 22. In Arkiv for Matematik. pp.1-24. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203516342444401.