Md Mizanur Rahman, Mohd Faizal Hasan, Aminuddin Saat, and Mazlan Abdul Wahid. 2017. “Economics of Biogas Plants and Solar Home Systems: For Household Energy Applications”. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 33 (1):14-26. https://semarakilmu.com.my/journals/index.php/fluid_mechanics_thermal_sciences/article/view/2617.