1. Harrison PD, Turner II BL. Pre-hispanic maya agriculture. Univ of New Mexico Pr, USA; 1978. p. 1-414.
2. Saunders MO. Hausa Irrigated agriculture at Mirria, Niger republic (Republic lique du Niger). The 23rd Annual Meeting of the African Studies Association, Philadelphia, Pennsylvania, USA; 1980. p. 1-323.
3. McConnell DJ. The Forest-garden farms of Kandy, Sri Lanka. Food & Agriculture Organization of the United Nations, USA; 1992. p. 1-117.
4. David WR, Wegerich K. The three blind spots of Afghanistan: Water flow, Irrigation development, and the impact of climate change. China and Eurasia. 2009;7(4):115-133.
5. IPCC. Climate change 2014:Synthesis report. Contribution of working groups I, II and III to the Fifth assessment report of the Intergovernmental Panel on Climate Change. In: Pachauri RK, et al, editors. Geneva, Switzerland: Intergovernmental Panel on Climate Change (IPCC), Switzerland; 2014.