Vadim Trenkaev Myungchul Kim Soonuk Seol Interoperability Testing Based on a Fault Model for a System of Communicating FSMs. 226-242 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2644&spage=226 2003 conf/pts/2003 TestCom db/conf/pts/testcom2003.html#TrenkaevKS03