@inproceedings{dan1977residual,
title={Residual intersections and Todds formula for the double locus of a morphism},
author={Dan Laksov},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203244885314233},
booktitle={Acta Mathematica},
volume={140},
number={1},
pages={75-92},
year={1977},
}
Dan Laksov. Residual intersections and Todds formula for the double locus of a morphism. 1977. Vol. 140. In Acta Mathematica. pp.75-92. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203244885314233.