@inproceedings{w.1941developments,
title={Developments in the analytic theory of algebraic differential equations},
author={W. J. Trjitzinsky},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203116532624622},
booktitle={Acta Mathematica},
volume={73},
number={1},
pages={1-85},
year={1941},
}
W. J. Trjitzinsky. Developments in the analytic theory of algebraic differential equations. 1941. Vol. 73. In Acta Mathematica. pp.1-85. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203116532624622.