1. Alur, R., 1991. Techniques for Automatic Verification of Real-Time Systems. Ph.D. thesis, Department of Computer Science, Stanford University
2. Model checking in dense real-time;Alur;Information and Computation,1993
3. Logics and models of real time: a survey;Alur,1992
4. On discretization of delays in timed automata and digital circuits;Asarin,1998