Grace A. Lewis Dennis B. Smith Kostas Kontogiannis Scott R. Tilley Mira Kajko-Mattsson Ned Chapin A Research Agenda for Maintenance & Evolution of SOA-Based Systems. 481-484 2007 ICSM http://dx.doi.org/10.1109/ICSM.2007.4362663 conf/icsm/2007 db/conf/icsm/icsm2007.html#LewisSKTKC07