@inproceedings{roman2000an,
title={An inversion formula for the attenuated X-ray transformation},
author={Roman G. Novikov},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203604170632788},
booktitle={Arkiv for Matematik},
volume={40},
number={1},
pages={145-167},
year={2000},
}
Roman G. Novikov. An inversion formula for the attenuated X-ray transformation. 2000. Vol. 40. In Arkiv for Matematik. pp.145-167. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203604170632788.