1. Maintaining knowledge about temporal intervals;Allen;Commun. ACM,1983
2. An integrated first-order theory of points and intervals: expressive power in the class of all linear orders;Conradie,2012
3. Branching Allen;Ragni,2004
4. Intervals, points, and branching time;Reich,1994
5. Models of axioms for time intervals;Ladkin,1987