A. Harrer and A. Lingnau. Bringing balance to the Forces of Learning Design Integrating Self-Regulated Planning and Scripting via model transformations. 2016 IEEE 16th International Conference on Advanced Learning Technologies, 2016.

D. Tsovaltzi, N. Rummel, B. M. McLaren, N. Pinkwart, O. Scheuer, A. Harrer, and I. Braun. Extending a Virtual Chemistry Laboratory with a Collaboration Script to Promote Conceptual Learning. International Journal on Technology Enhanced Learning, volume 2, issue 12, 2010.

N. Pinkwart, A. Harrer, and M. Kuhn. Process Support for Collaborative Inquiry Learning. Research and Practice in Technology Enhanced Learning, volume 5, issue 3, 2010.

D. Tsovaltzi, N. Rummel, N. Pinkwart, O. Scheuer, A. Harrer, I. Braun, and B. M. McLaren. CoChemEx: Supporting Conceptual Chemistry Learning via Computer-Mediated Collaboration Scripts. Proceedings of the 3rd European Conference on Technology Enhanced Learning (ECTEL), Springer Verlag, issue 5192, 2008.

D. Tsovaltzi, B. M. McLaren, N. Rummel, O. Scheuer, A. Harrer, N. Pinkwart, and I. \. Braun. Using an Adaptive Collaboration Script to Promote Conceptual Chemistry Learning. Proceedings of the 9th International Conference on Intelligent Tutoring Systems (ITS), Springer Verlag, issue 5091, 2008.

B. M. McLaren, N. Rummel, N. Pinkwart, D. Tsovaltzi, A. Harrer, and O. Scheuer. Learning Chemistry through Collaboration: A Wizard-of-Oz Study of Adaptive Collaboration Support. Proceedings of the Workshop on Intelligent Support for Exploratory Environments at the 3rd European Conference on Technology Enhanced Learning (ECTEL), CEUR-WS, 2008.

A. Harrer, N. Pinkwart, B. M. McLaren, and O. Scheuer. How Do We Get the Pieces to Talk? An Architecture to Support Interoperability between Educational Tools. Proceedings of the 9th International Conference on Intelligent Tutoring Systems (ITS), Springer Verlag, issue 5091, 2008.

A. Harrer, N. Pinkwart, B. M. McLaren, and O. Scheuer. The Scalable Adapter Design Pattern: Enabling Interoperability Between Educational Software Tools. IEEE Transactions on Learning Technologies, volume 1, issue 2, 2008.

B. M. McLaren, N. Rummel, D. Tsovaltzi, I. Braun, O. Scheuer, A. Harrer, and N. Pinkwart. The CoChemEx Project: Conceptual Chemistry Learning through Experimentation and Adaptive Collaboration. Proceedings of the Workshop on Emerging Technologies for Inquiry Based Learning in Science at the 13th International Conference on Artificial Intelligence in Education (AIED), 2007.

N. Pinkwart and A. Harrer. Tafelbilder Online - Lösungen zur Verbindung interaktiver Hörsaaltechnologie mit modernen Kommunikations- und Informationsmedien. Neue Medien. Interaktivität und Ubiquität, Wissenschaftsverlag Universität Duisburg-Essen, issue 28, 2006.

A. Harrer, S. Zeini, N. Pinkwart, L. Bollen, and H. U. Hoppe. Die Nutzung elektronischer Kommunikationsmittel in webunterstützten Lehrveranstaltungen. Entwicklung von Medienkompetenz im Hochschulbereich - Perspektiven, Kompetenzen und Anwendungsbeispiele, kopaed, 2006.

A. Harrer, S. Zeini, and N. Pinkwart. Evaluation of Communication in Web-supported Learning Communities - An Analysis with Triangulation Research Design. International Journal of Web Based Communities, volume 2, issue 4, 2006.

N. Pinkwart, A. Harrer, S. Lohmann, and S. Vetter. Integrating Portal Based Support Tools to Foster Learning Communities in University Courses. Proceedings of the 4th International Conference on Web Based Education (WBE), ACTA Press, 2005.

A. Harrer, S. Zeini, and N. Pinkwart. The Effects of Electronic Communication Support on Presence Learning Scenarios. Computer Supported Collaborative Learning 2005: The Next 10 Years! Proceedings of the International Conference on Computer Supported Collaborative Learning (CSCL), Lawrence Erlbaum Associates, 2005.