Thapa.S and Rijal. K., Role of Biogas in Easing Ecological Stress: A Case Study from Buffer Zone of Shuklaphanta Wildlife Reserve Proceeding on Third International Conference on Addressing Climate Change for Sustainable Development through Up-Scaling Renewable Energy Technologies, October 12-14, 2011, Kathmandu, Nepal
Rijal, K. Fuzzy Description of River Water Quality: A Way for Defining Water Quality in Linguistic Approach. Journal of Institute of Science and Technology, Vol.17, 2011/012, pp.122-130.
Ryal, J and Rijal, K. Comparative Study on Different Methods of Domestic Organic Waste Composting in Bhaktapur, Nepal. Global Waste Management Symposium, September 30- October 3, 2012, Phoenix, AZ, USA