@inproceedings{lars1980spectral,
title={Spectral synthesis in sobolev spaces, and uniqueness of solutions of the Dirichlet problem},
author={Lars Inge Hedberg},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203255868857306},
booktitle={Acta Mathematica},
volume={147},
number={1},
pages={237-264},
year={1980},
}
Lars Inge Hedberg. Spectral synthesis in sobolev spaces, and uniqueness of solutions of the Dirichlet problem. 1980. Vol. 147. In Acta Mathematica. pp.237-264. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203255868857306.