Nawaz, Muhammad Ahmed , Raheem,  Abdur, shakoor, Rabia, AND Anwar,  Zaira . " Feasibility and Optimization of Standalone PV/Biogas Hybrid Distributed Renewable System for Rural Electrification: A Case Study of a Cholistan Community" Mehran University Research Journal of Engineering and Technology [Online], Volume 38 Number 2 (1 April 2019)