@article{ReasoningTemporalRelations,
  title = "Reasoning about temporal relations : the tractable subalgebras of Allen's interval algebra",
  author = "Andrei Krokhin and Peter Jeavons and Peter Jonsson",
  year = "2003",
  journal = "Journal of the ACM",
  note = "Earlier version available as an OUCL Research Report : \url{http://web.comlab.ox.ac.uk/oucl/publications/tr/rr-01-12.html}",
  number = "50",
  pages = "591--640",
  doi = "10.1145/876638.876639",
}