Robert Nieuwenhuis The impact of CASC in the development of automated deduction systems. 77-78 2002 15 AI Commun. 2-3 http://iospress.metapress.com/openurl.asp?genre=article&issn=0921-7126&volume=15&issue=2&spage=77 db/journals/aicom/aicom15.html#Nieuwenhuis02