@inproceedings{herbert1949on,
title={On certain asymptotic solutions of Riccati's differential equation},
author={Herbert Olsson},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203409134123834},
booktitle={Arkiv for Matematik},
volume={1},
number={1},
pages={21-25},
year={1949},
}
Herbert Olsson. On certain asymptotic solutions of Riccati's differential equation. 1949. Vol. 1. In Arkiv for Matematik. pp.21-25. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203409134123834.