@inproceedings{cecilia2011area-preserving,
title={Area-preserving isotopies of self-transverse immersions of$S$^{1}in ℝ^{2}},
author={Cecilia Karlsson},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203634974410039},
booktitle={Arkiv for Matematik},
volume={51},
number={1},
pages={85-97},
year={2011},
}
Cecilia Karlsson. Area-preserving isotopies of self-transverse immersions of$S$^{1}in ℝ^{2}. 2011. Vol. 51. In Arkiv for Matematik. pp.85-97. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203634974410039.