P. Vijay Suman Paritosh K. Pandya Shankara Narayanan Krishna Lakshmi Manasa Timed Automata with Integer Resets: Language Inclusion and Expressiveness. 78-92 2008 FORMATS http://dx.doi.org/10.1007/978-3-540-85778-5_7 conf/formats/2008 db/conf/formats/formats2008.html#SumanPKM08