Törnros, T., Dorn, H., Reichert, M., Ebner-Priemer, U., Salize, H.-J., Tost, H., Meyer-Lindenberg, A. and Zipf, A. (2016) “A comparison of temporal and location-based sampling strategies for global positioning system-triggered electronic diaries”, Geospatial Health, 11(3). doi: 10.4081/gh.2016.473.