MathSciDoc: An Archive for Mathematician ∫

@inproceedings{j.1987$a$-superharmonic,
  title={$A$-superharmonic functions and supersolutions of degenerate elliptic equations},
  author={J. Heinonen, and T. Kilpeläinen},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203526040511479},
  booktitle={Arkiv for Matematik},
  volume={26},
  number={1},
  pages={87-105},
  year={1987},
}