M. Stubbemann, T. Hanika, and G. Stumme. Advances in Intelligent Data Analysis XVIII - 18th International Symposium on Intelligent Data Analysis, IDA 2020, Konstanz, Germany, April 27-29, 2020, Proceedings, volume 12080 of Lecture Notes in Computer Science, page 496--508. Springer, (2020)
B. Schaefermeier, T. Hanika, and G. Stumme. Proceedings of the 16th EAI International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services, ACM, (November 2019)
T. Hanika, F. Schneider, and G. Stumme. Accepted for publication in: Tohoku Mathematical Journal, (2020)cite arxiv:1801.07985Comment: v2: completely rewritten 28 pages, 3 figures, 2 tables.