1. Bacanli UG, Dikbas F, Baran T (2008) Drought analysis and a sample study of Aegean Region. Sixth International Conference on Ethics and Environmental Policies, Padova, 23–25 October
2. Bordi I, Fraedrich K, Sutera A (2009) Observed drought and wetness trends in Europe: an update. Hydrol Earth Syst Sci 13:1519–1530
3. Deni SM, Suhaila J, Zin WZW, Jemain AA (2009) Trends of wet spells over Peninsular Malaysia during monsoon seasons. Sains Malaysiana 38(2):133–142
4. Department of Defense (2011) Trends and implications of climate change for national and international security. Office of the Under Secretary of Defense, Washington
5. Hamed KH (2009) Exact distribution of the Mann–Kendall trend test statistic for persistent data. J Hydrol 365:86–94