MathSciDoc: An Archive for Mathematician ∫

@inproceedings{john1992contact,
  title={Contact geometry and CR structures on$S$^{3}},
  author={John S. Bland},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203321210004492},
  booktitle={Acta Mathematica},
  volume={172},
  number={1},
  pages={1-49},
  year={1992},
}