Poudel, R. C., Joshi, D. R., Dhakal, N. R., & Karki, A. B. (2010). Evaluation of Hygienic Treatment of Biowastes by Anaerobic Digestion in Biogas Plants. Nepal Journal of Science and Technology, 10, 183–188. https://doi.org/10.3126/njst.v10i0.2958