Shaukat, N., Khan, B., Khan, T., Younis, M. N., Faris, N. ul, Javed, A. and Iqbal, M. N. (2016) “A Comprehensive Review of Biogas Sector for Electric Power Generation in Pakistan”, PSM Biological Research, 1(1), pp. 43-48. Available at: https://journals.psmpublishers.org/index.php/biolres/article/view/23 (Accessed: 15October2019).