@inproceedings{Triggs99a,
  title = {Differential Matching Constraints},
  author = {Bill Triggs},
  year = {1999},
  url = {http://computer.org/proceedings/iccv/0164/vol 201/01640370abs.htm},
  tags = {constraints},
  researchr = {https://researchr.org/publication/Triggs99a},
  cites = {0},
  citedby = {0},
  pages = {370-376},
  booktitle = {ICCV},
}