1. Aondover T, Woo M (1998) Changes in rainfall characteristics in northern Nigeria. Intl J Climatol 18:1261–1271
2. Bates BC, Kundzewicz ZW, Wu S, Palutikof JP (eds) (2007) Chapter 3. Linking climate change and water resources: impacts and responses. In: IPCC Technical Paper VI, http://www.ipcc.ch/pdf/technical-papers/ccw/chapter3.pdf . Accessed 10 May 2009
3. Cheng KS, Hsu HW, Tsai MH, Chang KC, Lee RH (2010) Test and analysis of trend existence in rainfall data, http://www.wrrc.dpri.kyotou.ac.jp/∼aphw/APHW2004/proceedings/OHS/56-OHS-A527%20%28PDF%20only%29/56-OHS-A527.pdf . Accessed 22 October 2010
4. Cheval S, Dumitrescu A, Bell A (2008) The urban heat island of Bucharest during the extreme high temperatures of July 2007. Theor Appl Climatol 97(3–4):391-401. doi: 10.1007/s00704-008-0088-3
5. Christy JR, Clarke RA, Gruza GV, Jouze J, Mann ME, Oerlemans J, Salinger MJ, Wang SW Lead Authors (2001) Chapter 2—Observed climate variability and change. In: IPCC Third Assessment Report—Climate Change, http://www.grida.no/publications/other/ipcc_tar . Accessed 22 September 2010