T. van Dijk, T. Greiner, B. den Heijer, N. Henning, F. Klesen, и A. Löffler. Proceedings of the 26th ACM SIGSPATIAL International Conference
on Advances in Geographic Information Systems, SIGSPATIAL 2018,
Seattle, WA, USA, November 06-09, 2018, стр. 626--629. ACM, (2018)