MathSciDoc: An Archive for Mathematician ∫

@inproceedings{avner1973fundamental,
  title={Fundamental solutions for degenerate parabolic equations},
  author={Avner Friedman},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203234047986178},
  booktitle={Acta Mathematica},
  volume={133},
  number={1},
  pages={171-217},
  year={1973},
}