@inproceedings{Gibbons95:Dotted,
  title = "Dotted and Dashed Lines in Metafont",
  author = "Jeremy Gibbons",
  year = "1995",
  booktitle = "Proceedings of the 1995 Annual Meeting",
  editor = "Robin Fairbairns",
  organization = "\TeX{} Users' Group",
  url = "http://www.cs.ox.ac.uk/people/jeremy.gibbons/publications/dashed.ps.gz",
}