Volume 21, 2021 Hydrological Modeling of Artificial Recharge of Groundwater for Sustainable Water Supply in Dodoma City Wolfugang Paul Venance, George Venance Lugomela and Verdiana Grace Masanja Pages 1-20 Download Pathway Fractional Integral Operator on Some τ-extensions of Lauricella Functions Of Several Variables R.K.Bairwa and Ajay Kumar Pages 21-29 Download Insurance Companies Portfolio Optimization with Possibilities of Recovery after Ruin: A Case of Exponential Utility Function Masoud Komunte, Christian Kasumo and Verdiana Grace Masanja Pages 31-42 Download Quadratically Optimal Bi-Matrix Games Somdeb Lahiri Pages 43-52 Download Image Fusion Based on NSST and CSR Under Robust Principal Component Analysis Li Quanjun,Zhang Guicang and Han Genliang Pages 53-64 Download A Study of k-generalized Mittag-Leffler Type Function with Four Parameters R.K.Bairwa and Karan Singh Pages 65-80 Download