Lucia Acciai Michele Boreale Deciding Safety Properties in Infinite-State Pi-Calculus via Behavioural Types. 31-42 2009 ICALP (2) http://dx.doi.org/10.1007/978-3-642-02930-1_3 conf/icalp/2009-2 db/conf/icalp/icalp2009-2.html#AcciaiB09