- Water Research Commision (2015, January). Do invasive alien plants really use more water? study investigates:invasive alien species management, Water Wheel, 14(1), 27 – 29.
- Bockmuhl, F. (2009). The Platveld Aquifer Study (PAS) [PowerPoint slides]. Retrieved from http://www.biota-africa.org/downloads/rangelandforum/3_Frank_Groundwater.pdf
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