@inproceedings{masaaki1989duality,
title={Duality of space curves and their tangent surfaces in characteristic$p$>0},
author={Masaaki Homma},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203535248260558},
booktitle={Arkiv for Matematik},
volume={29},
number={1},
pages={221-235},
year={1989},
}
Masaaki Homma. Duality of space curves and their tangent surfaces in characteristic$p$>0. 1989. Vol. 29. In Arkiv for Matematik. pp.221-235. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203535248260558.