@inproceedings{robert2005connecting,
title={Connecting rational homotopy type singularities},
author={Robert Hardt, and Tristan Rivière},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203351466016699},
booktitle={Acta Mathematica},
volume={200},
number={1},
pages={15-83},
year={2005},
}

Robert Hardt, and Tristan Rivière. Connecting rational homotopy type singularities. 2005. Vol. 200. In Acta Mathematica. pp.15-83. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203351466016699.