@inproceedings{t.1906on,
title={On the roots of the characteristic equation of a linear substitution},
author={T. J. I’a Bromwich},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203019140393176},
booktitle={Acta Mathematica},
volume={30},
number={1},
pages={297-304},
year={1906},
}
T. J. I’a Bromwich. On the roots of the characteristic equation of a linear substitution. 1906. Vol. 30. In Acta Mathematica. pp.297-304. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203019140393176.