Groß, Sven, and Anne Menzel. 2016. “GPS Tracking at Tourist Destinations—A New Software for the Analysis of Tourist Mobility Behavior Illustrated by Hikers in the Harz Mountains”. Raumforschung Und Raumordnung | Spatial Research and Planning 74 (1): 51–68. https://doi.org/10.1007/s13147-016-0381-z.