@inproceedings{g.1952on,
title={On certain configurations of the cardinal points in plane kinematics},
author={G. C. Steward},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203136726769771},
booktitle={Acta Mathematica},
volume={88},
number={1},
pages={371-383},
year={1952},
}
G. C. Steward. On certain configurations of the cardinal points in plane kinematics. 1952. Vol. 88. In Acta Mathematica. pp.371-383. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203136726769771.