Pekka Ruuska Matti Kärki TTCN-3 Language Characteristics in Producing Reusable Test Software. 49-58 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3107&spage=49 2004 conf/icsr/2004 ICSR db/conf/icsr/icsr2004.html#RuuskaK04