A Generic Metric for Measuring Complexity of Models. - Christian Schalles; John Creagh; Michael Rebstock (ICEIS (3), 2010)

Ein generischer Ansatz zur Messung der Benutzerfreundlichkeit von Modellierungssprachen. - Christian Schalles; Michael Rebstock; John Creagh (Modellierung, 2010)

Usability of Modelling Languages for Model Interpretation: An Empirical Research Report. - Christian Schalles; John Creagh; Michael Rebstock (Wirtschaftsinformatik, 2011)

Exploring usability-driven Differences of graphical Modeling Languages: An empirical Research Report. - Christian Schalles; John Creagh; Michael Rebstock (Modellierung, 2012)

A Causal Model for Analyzing the Impact of Graphical Modeling Languages on Usability. - Christian Schalles; John Creagh; Michael Rebstock (Int. J. Softw. Eng. Knowl. Eng., 2014)