@inproceedings{steven1995the,
title={The multiple-point schemes of a finite curvilinear map of codimension one},
author={Steven Kleiman, Joseph Lipman, and Bernd Ulrich},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203549029984669},
booktitle={Arkiv for Matematik},
volume={34},
number={2},
pages={285-326},
year={1995},
}

Steven Kleiman, Joseph Lipman, and Bernd Ulrich. The multiple-point schemes of a finite curvilinear map of codimension one. 1995. Vol. 34. In Arkiv for Matematik. pp.285-326. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203549029984669.