@inproceedings{paul1978riemann-roch,
title={Riemann-Roch and topological$K$-theory for singular varieties},
author={Paul Baum, William Fulton, and Robert MacPherson},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203249607116263},
booktitle={Acta Mathematica},
volume={143},
number={1},
pages={155-192},
year={1978},
}
Paul Baum, William Fulton, and Robert MacPherson. Riemann-Roch and topological$K$-theory for singular varieties. 1978. Vol. 143. In Acta Mathematica. pp.155-192. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203249607116263.