1. ISDR: Terminology 2009. UN/ISDR web page. 〈http://www.unisdr.org/we/inform/terminology〉 (accessed 15.09.10)
2. Global Survey of Early Warning Systems. UN/ISDR Report, 2006; 56p. 〈http://www.unisdr.org/2006/ppew/info-resources/ewc3/Global-Survey-of-Early-Warning-Systems.pdf〉.
3. Landslide early warning system: toolbox and general concepts;Intrieri;Nat. Hazards Earth Syst. Sci.,2013
4. Di Biagio E., Kjekstad O. Early warning, instrumentation and monitoring landslides, in: Proceedings of the 2nd Regional Training Course, RECLAIM II, Phuket, Thailand, January 29–February 02 2007.
5. Early warning systems and multidisciplinary approaches in natural hazards and risk assessments;Glade;GEORISK,2008