R. Ramler, S. Biffl, P. Grünbacher:
"Value-Based Management of Software Testing";
in: "Value-Based Software Engineering", Springer, Berlin Heidelberg, 2005, ISBN: 3-540-25993-7, 225 - 244.
http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC05936457