@inproceedings{william1977a,
title={A note on residual intersections and the double point formula},
author={William Fulton},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203245021246234},
booktitle={Acta Mathematica},
volume={140},
number={1},
pages={93-101},
year={1977},
}