"7. Seismic landslide hazard zonation". Faculty of Geo-Information Science and Earth Observation of the University of Twente. 2006-09-29. Archived from the original on 2010-08-15. Retrieved 2010-12-12.
"7. Seismic landslide hazard zonation". Faculty of Geo-Information Science and Earth Observation of the University of Twente. 2006-09-29. Archived from the original on 2010-08-15. Retrieved 2010-12-12.