Difference Tools for Analysis and Design Documents. - Dirk Ohst; Michael Welle; Udo Kelter (ICSM, 2003)

Differences between versions of UML diagrams. - Dirk Ohst; Michael Welle; Udo Kelter (ESEC / SIGSOFT FSE, 2003)

Bericht über die International Conference on Software Maintenance 2003 vom 19. bis 27. September 2003 in Amsterdam, Niederlande. - Michael Welle (Softwaretechnik-Trends, 2003)