Parosh Aziz Abdulla Ahmed Bouajjani Lukás Holík Lisa Kaati Tomás Vojnar Computing Simulations over Tree Automata. 93-108 2008 TACAS http://dx.doi.org/10.1007/978-3-540-78800-3_8 conf/tacas/2008 db/conf/tacas/tacas2008.html#AbdullaBHKV08