Gagandeep Kaur, Yadwinder. Singh. Brar, and D. P. Kothari. 2017. “Perspective of Estimated Energy Generation from Livestock Dung for an Indian State Punjab”. International Journal of Advance Engineering and Research Development (IJAERD) 4 (10):166-71. https://www.ijaerd.org/index.php/IJAERD/article/view/3780.