Elshall, A., Pham, H. V., Tsai, F., Yan, L., Ye, M. (2015). Parallel inverse modeling and uncertainty quantification for computationally demanding groundwater-flow models using covariance matrix adaptation, Journal of Hydrologic Engineering, 20 (8), 04014087, 10.1061/(ASCE)HE.1943-5584.0001126