@inproceedings{peter1971estimates,
title={Estimates of mass distributions from their potentials and energies},
author={Peter Sjögren},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203448707235165},
booktitle={Arkiv for Matematik},
volume={10},
number={1},
pages={59-77},
year={1971},
}
Peter Sjögren. Estimates of mass distributions from their potentials and energies. 1971. Vol. 10. In Arkiv for Matematik. pp.59-77. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203448707235165.