B. Paassen, B. Hammer, T. Price, T. Barnes, S. Gross, and N. Pinkwart. The Continuous Hint Factory - Providing Hints in Vast and Sparsely Populated Edit Distance Spaces. Journal of Educational Data Mining, Educational Data Mining Society, volume 10, issue 1, 2018.

S. Gross, B. Mokbel, B. Hammer, and N. Pinkwart. Learning Feedback in Intelligent Tutoring Systems. KI - Künstliche Intelligenz, Springer Berlin Heidelberg, 2015.

S. Gross, B. Mokbel, B. Hammer, and N. Pinkwart. How to Select an Example? A Comparison of Selection Strategies in Example-Based Learning. Proceedings of the 12th International Conference on Intelligent Tutoring Systems (ITS), Springer Verlag, issue 8474, 2014.

S. Gross, B. Mokbel, B. Paassen, B. Hammer, and N. Pinkwart. Example-based feedback provision using structured solution spaces. International Journal of Learning Technology, volume 9, issue 3, 2014.

B. Mokbel, S. Gross, B. Paassen, N. Pinkwart, and B. Hammer. Domain-Independent Proximity Measures in Intelligent Tutoring Systems. Proceedings of the 6th International Conference on Educational Data Mining (EDM), 2013.

S. Gross, B. Mokbel, B. Hammer, and N. Pinkwart. Towards a Domain-Independent ITS Middleware Architecture. Proceedings of the 13th IEEE International Conference on Advanced Learning Technologies (ICALT), IEEE Computer Society Press, 2013.

S. Gross, B. Mokbel, B. Hammer, and N. Pinkwart. Towards Providing Feedback to Students in Absence of Formalized Domain Models. Proceedings of the 16th International Conference on Artificial Intelligence in Education (AIED), Springer Verlag, volume 7926, 2013.

N. Pinkwart and B. Hammer. Towards Learning Feedback in Intelligent Tutoring Systems by Clustering Spaces of Student Solutions. Proceedings of the 25th International Conference of the Florida Artificial Intelligence Research Society (FLAIRS), AAAI, 2012.

B. Mokbel, S. Gross, M. Lux, N. Pinkwart, and B. Hammer. How to Quantitatively Compare Data Dissimilarities for Unsupervised Machine Learning? Proceedings of the 5th International Workshop on Artificial Neural Networks in Pattern Recognition (ANNPR), Springer Verlag, issue 7477, 2012.

S. Gross, X. Zhu, B. Hammer, and N. Pinkwart. Cluster Based Feedback Provision Strategies in Intelligent Tutoring Systems. Proceedings of the 11th International Conference on Intelligent Tutoring Systems (ITS), Springer Verlag, issue 7315, 2012.

S. Gross, B. Mokbel, B. Hammer, and N. Pinkwart. Feedback Provision Strategies in Intelligent Tutoring Systems Based on Clustered Solution Spaces. Tagungsband der 10. e-Learning Fachtagung Informatik (DeLFI), GI, issue 207, 2012.