@inproceedings{judith2019flexible,
  title={Flexible and inflexible CR submanifolds},
  author={Judith Brinkschulte, and C. Denson Hill},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191204132615922303583},
  booktitle={Arkiv for Matematik},
  volume={57},
  number={1},
  pages={23-33},
  year={2019},
}
             
            
                
Judith Brinkschulte, and C. Denson Hill. Flexible and inflexible CR submanifolds. 2019. Vol. 57. In Arkiv for Matematik. pp.23-33. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191204132615922303583.