Sapkota, T., Aryal, J., Thapa, S. and Karki, A.B. 2013. Biogas Production from Anaerobic Digestion of Different Biodegradable Materials. Nepal Journal of Science and Technology. 13, 2 (Mar. 2013), 123–128. DOI:https://doi.org/10.3126/njst.v13i2.7724.