Shrestha, B., Homagai, P., Pokhrel, M. and Ghimire, K. (2013) “Adsorptive Removal of Toxic Metal from Aqueous Solution by Using a Biowaste -Used Tea Leaves”, Nepal Journal of Science and Technology, 13(2), pp. 109–114. doi: 10.3126/njst.v13i2.7722.