@inproceedings{a.1935über, title={Über die$W$-Kurven im dreidimensionalen Raume}, author={A. Wiman}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203106331222543}, booktitle={Acta Mathematica}, volume={64}, number={1}, pages={243-352}, year={1935}, }