A. Ebner, H. Werthner:
"Operation and Maintaining Web Applications";
in: "Web Engineering - Systematic Development of Web Applications", G. Kappel, B. Pröll, S. Reich (ed.); John Wiley and Sons, NY, 2006, ISBN: 0470015543.
http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC06586831