M. T. Islam, and Md. Imtiazul Haque. “Community Based Micro Off-Grid Power System Using Renewable Energy Technology (RET): Investment Analysis, Cost Benefit and Main Factors”. Global Journals of Research in Engineering, vol. 14, no. F1, Jan. 2014, pp. 19-26, https://engineeringresearch.org/index.php/GJRE/article/view/1004.