@inproceedings{gershon1992criteria,
title={Criteria for validity of the maximum modulus principle for solutions of linear parabolic systems},
author={Gershon I. Kresin, and Vladimir G. Maz'ya},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203542563504618},
booktitle={Arkiv for Matematik},
volume={32},
number={1},
pages={121-155},
year={1992},
}
Gershon I. Kresin, and Vladimir G. Maz'ya. Criteria for validity of the maximum modulus principle for solutions of linear parabolic systems. 1992. Vol. 32. In Arkiv for Matematik. pp.121-155. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203542563504618.