M. Jazayeri, C. Ghezzi, D. Mandrioli:
"Software Qualities and Principles";
in: "Computer Science Handbook", A. Tucker (ed.); Chapman & Hall/CRC, 2004, ISBN: 1-58488-360-x, 2 - 24.
http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04968613