Beata Konikowska Wojciech Penczek On Designated Values in Multi-valued CTL<sup>*</sup> Model Checking. 211-224 2004 60 Fundam. Inform. 1-4 http://iospress.metapress.com/openurl.asp?genre=article&issn=0169-2968&volume=60&issue=1&spage=211 db/journals/fuin/fuin60.html#KonikowkaP04