Adam Zachary Wyner Maintaining Obligations on Stative Expressions in a Deontic Action Logic. 258-274 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3065&spage=258 2004 conf/deon/2004 DEON db/conf/deon/deon2004.html#Wyner04