@article{Luo99:2,
  title = {Coercive Subtyping},
  author = {Zhaohui Luo},
  year = {1999},
  url = {http://www.oup.co.uk/logcom/hdb/Volume_09/Issue_01/090105.sgm.abs.html},
  tags = {subtyping},
  researchr = {https://researchr.org/publication/Luo99%3A2},
  cites = {0},
  citedby = {0},
  journal = {Journal of Logic and Computation},
  volume = {9},
  number = {1},
  pages = {105-130},
}