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Rony Wallach; Christine Jortzick. (2008). Unstable finger-like flow in water-repellent soils during wetting and redistribution – The case of a point water source. , 351(1-2), 26–41. doi:10.1016/j.jhydrol.2007.11.032 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research