2006, Article in monograph or in proceedings (Havelund, K.; Nunez, M.; Rosu, G. (ed.), Formal Approaches to Software Testing and Runtime Verification - FATES/RV'06, pp. 40-54)
2004, Part of book or chapter of book (Boer, F.S. de; Boer, F.S. de; Bosangue, M.M. (ed.), Formal Methods for Components and Objects: Second International Symposium, FMCO 2003, Leiden, The Netherlands, November 4-7, 2003. Revised Lectures, pp. 223-239)