@inproceedings{leonid2008determinants,
title={DETERMINANTS OF ZEROTH ORDER OPERATORS},
author={Leonid Friedlander, and Victor Guillemin},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160909103048344927703},
booktitle={Journal of Differential Geometry},
volume={78},
number={1},
pages={1-12},
year={2008},
}
Leonid Friedlander, and Victor Guillemin. DETERMINANTS OF ZEROTH ORDER OPERATORS. 2008. Vol. 78. In Journal of Differential Geometry. pp.1-12. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160909103048344927703.