@inproceedings{avner1961asymptotic,
title={Asymptotic behavior of solutions of parabolic equations of any order},
author={Avner Friedman},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203157158461922},
booktitle={Acta Mathematica},
volume={106},
number={1},
pages={1-43},
year={1961},
}
Avner Friedman. Asymptotic behavior of solutions of parabolic equations of any order. 1961. Vol. 106. In Acta Mathematica. pp.1-43. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203157158461922.