Bhattarai, S., Aryal, S. and Thapa, R. (2015) “The Capacity of Lignin to Enhance the Phthorimaea opercullela Granulovirus (PhopGV) Stability in Laboratory Condition”, International Journal of Applied Sciences and Biotechnology, 3(2), pp. 256-260. doi: 10.3126/ijasbt.v3i2.12481.