H. Bast, P. Brosi, and S. Storandt. Proceedings of the ACM International Conference on Advances in Geographic Information Systems (SIGSPATIAL), page 13-22. ACM, (2018)
L. Chuang, and U. Pfeil. Proceedings of the CHI Conference on Human Factors in Computing Systems-Extended Abstracts (CHI-EA), page SIG04:1-SIG04:4. ACM, (2018)