C. Batini, T. Catarci, M. Costabile, and S. Levialdi. Proceedings of the IFIP TC2/WG 2.6 Second Working Conference on Visual Database Systems II, page 153--168. Amsterdam, The Netherlands, The Netherlands, North-Holland Publishing Co., (1992)
M. Costabile, and A. Piccinno. End-User Software Engineering, 07081, Internationales Begegnungs- und Forschungszentrum fuer Informatik (IBFI), Schloss Dagstuhl, Germany, (2007)$<$http://drops.dagstuhl.de/opus/volltexte/2007/1081$>$ date of citation: 2007-01-01.