Khoumsi, W. , Hammani, A. , Kuper, M. , Bouaziz, A.. "Deterioration of Groundwater in Arid Environments: What Impact in Oasis Dynamics? Case Study of Tafilalet, Morocco". World Academy of Science, Engineering and Technology, Open Science Index 95, International Journal of Environmental and Ecological Engineering, (2014), 8(11), 764 - 770.