@inproceedings{stefan2006embeddings,
title={Embeddings through discrete sets of balls},
author={Stefan Borell, and Frank Kutzschebauch},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203623435918944},
booktitle={Arkiv for Matematik},
volume={46},
number={2},
pages={251-269},
year={2006},
}
Stefan Borell, and Frank Kutzschebauch. Embeddings through discrete sets of balls. 2006. Vol. 46. In Arkiv for Matematik. pp.251-269. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203623435918944.