Methodik und Ergebnisse einer Experimentreihe über Entwurfsmuster. - Lutz Prechelt; Barbara Unger 001 (Inform. Forsch. Entwickl., 1999)

An Experiment Measuring the Effects of Personal Software Process (PSP) Training. - Lutz Prechelt; Barbara Unger 001 (IEEE Trans. Software Eng., 2001)

A Controlled Experiment in Maintenance Comparing Design Patterns to Simpler Solutions. - Lutz Prechelt; Barbara Unger 001; Walter F. Tichy; Peter Brössler; Lawrence G. Votta (IEEE Trans. Software Eng., 2001)

Experimentelle Bewertung der Auswirkungen von Entwurfsmustern. - Barbara Unger-Lamprecht (Verlag-Haus Monsenstein und Vannerdat, 2001)

Two Controlled Experiments Assessing the Usefulness of Design Pattern Documentation in Program Maintenance. - Lutz Prechelt; Barbara Unger 001; Michael Philippsen; Walter F. Tichy (IEEE Trans. Software Eng., 2002)

A controlled experiment on inheritance depth as a cost factor for code maintenance. - Lutz Prechelt; Barbara Unger 001; Michael Philippsen; Walter F. Tichy (J. Syst. Softw., 2003)