@inproceedings{kathryn1983infinite,
title={Infinite groups and Hill's equation},
author={Kathryn Kuiken, and John T. Masterson},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203521901490444},
booktitle={Arkiv for Matematik},
volume={24},
number={1},
pages={119-130},
year={1983},
}
Kathryn Kuiken, and John T. Masterson. Infinite groups and Hill's equation. 1983. Vol. 24. In Arkiv for Matematik. pp.119-130. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203521901490444.