1. Abdi H, Williams LJ (2010) Principal component analysis. WIREs Comp Stat 2:433–459
2. Alcamo J, Moreno JM, Nováky B, Bindi M, Corobov R, Devoy RJN, Giannakopoulos C, Martin E, Olesen JE, Shvidenko A (2007) Europe. In: Parry ML, Canziani OF, Palutikof JP, van der Linden PJ, Hanson CE (eds) Climate change 2007: Impacts, adaptation and vulnerability. Contribution of Working Group II to the Fourth assessment report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, UK, pp 541–580
3. Anderberg MR (1973) Cluster analysis for applications. Academic Press, New York
4. Apaydin H, Erpul G, Bayramin I, Gabriels D (2006) Evaluation of indices for characterizing the distribution and concentration of precipitation: a case for the region of Southeastern Anatolia Project, Turkey. J Hydrol 328:726–732
5. Baigorria GA, Jones JW, O'brien JJO (2007) Understanding spatial rainfall variability in southeast USA at different timescales. Int J Climatol 27:749–760