@inproceedings{folke1951eine, title={Eine neue Art monotoner Kettenbruchentwicklungen}, author={Folke Ryde}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203411956206854}, booktitle={Arkiv for Matematik}, volume={1}, number={4}, pages={319-339}, year={1951}, }