Davide Bresolin Dario Della Monica Valentin Goranko Angelo Montanari Guido Sciavicco Decidable and Undecidable Fragments of Halpern and Shoham's Interval Temporal Logic: Towards a Complete Classification. 590-604 2008 LPAR http://dx.doi.org/10.1007/978-3-540-89439-1_41 conf/lpar/2008 db/conf/lpar/lpar2008.html#BresolinMGMS08