@inproceedings{m.1961a,
title={A star domain with densest admissible point set not a lattice},
author={M. R. von Wolff},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203159343495940},
booktitle={Acta Mathematica},
volume={108},
number={1},
pages={53-60},
year={1961},
}