@inproceedings{f.1903über, title={Über die Moduln der Thetafunctionen}, author={F. Schottky}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203013456685129}, booktitle={Acta Mathematica}, volume={27}, number={1}, pages={235-288}, year={1903}, }