G. Wagenaar, R. Helms, D. Damian, und S. Brinkkemper. Product-Focused Software Process Improvement, Volume 9459 von Lecture Notes in Computer Science, Springer International Publishing, (2015)
J. Yli-Huumo, A. Maglyas, und K. Smolander. Product-Focused Software Process Improvement, Volume 8892 von Lecture Notes in Computer Science, Springer International Publishing, (2014)