Véronique Bruyère Emmanuel Dall'Olio Jean-François Raskin Durations, Parametric Model-Checking in Timed Automata with Presburger Arithmetic. 687-698 2003 conf/stacs/2003 STACS http://dx.doi.org/10.1007/3-540-36494-3_60 db/conf/stacs/stacs2003.html#BruyereDR03