MathSciDoc: An Archive for Mathematician ∫

@inproceedings{d.1965curves,
  title={Curves on 2-manifolds and isotopies},
  author={D. B. A. Epstein},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203207900291005},
  booktitle={Acta Mathematica},
  volume={115},
  number={1},
  pages={83-107},
  year={1965},
}