@inproceedings{EndrissGabbayESSLLI2003,
  author =        {Ulle Endriss and Dov Gabbay},
  title =         {Halfway between Points and Intervals: A Temporal Logic Based on Ordered Trees},
  editor =        {V.~Goranko and A.~Montanari},
  booktitle =     {ESSLLI Workshop on Interval Temporal Logics and Duration Calculi},
  pages =         {100--109},
  month =         {August},
  year =          {2003}
}