@inproceedings{emmanuele2006harnack,
title={Harnack estimates for quasi-linear degenerate parabolic differential equations},
author={Emmanuele DiBenedetto, Ugo Gianazza, and Vincenzo Vespri},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203351834808702},
booktitle={Acta Mathematica},
volume={200},
number={2},
pages={181-209},
year={2006},
}

Emmanuele DiBenedetto, Ugo Gianazza, and Vincenzo Vespri. Harnack estimates for quasi-linear degenerate parabolic differential equations. 2006. Vol. 200. In Acta Mathematica. pp.181-209. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203351834808702.