Michael Westergaard Sami Evangelista Lars Michael Kristensen ASAP: An Extensible Platform for State Space Analysis. 303-312 2009 Petri Nets http://dx.doi.org/10.1007/978-3-642-02424-5_18 conf/apn/2009 db/conf/apn/pn2009.html#WestergaardEK09