@inproceedings{martin2019free,
  title={Free boundary minimal surfaces in the unit ball : recent advances and open questions},
  author={Martin Man-chun Li},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20200103164644640713620},
  booktitle={arXiv preprint  arXiv:1907.05053},
  year={2019},
}
             
            
                
Martin Man-chun Li. Free boundary minimal surfaces in the unit ball : recent advances and open questions. 2019. In arXiv preprint  arXiv:1907.05053. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20200103164644640713620.