1. Ozdogan, M., et al.: Remote sensing of irrigated agriculture: opportunities and challenges. Review. Remote Sens. 2, 2274–2304 (2010)
2. Qablawi, B.: A comparison of four methods to estimate groundwater recharge for Northeastern South Dakota (2016)
3. Villholth, K., Jordano, M.: Ground water use in global perspective can it be managed? (2007)
4. Pavelic, P., et al.: Water-balance approach for assessing potential for smallholder groundwater irrigation in Sub-Saharan Africa. International Water Management Institute, Colombo, Sri Lanka (2012)
5. Shah, T., Burke, J., Villholth, K.: Groundwater: a global assessment of scale and significance. In: Water for Food, Water for Life: A Comprehensive Assessment of Water Management in Agriculture, International Water Management Institute (IWMI), Colombo, Sri Lanka, Earthscan, London (2007). Chapter 10