@inproceedings{norman1972ideal,
title={Ideal theory on non-orientable Klein surfaces},
author={Norman L. Alling, and Balmohan V. Limaye},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203450168407177},
booktitle={Arkiv for Matematik},
volume={10},
number={1},
pages={277-292},
year={1972},
}
Norman L. Alling, and Balmohan V. Limaye. Ideal theory on non-orientable Klein surfaces. 1972. Vol. 10. In Arkiv for Matematik. pp.277-292. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203450168407177.