Shrestha, R.M., Varga, M., Varga, I., Yadav, A.P., Pokharel, B.P. and Pradhananga, R.R. 2014. Removal of Ni (II) from Aqueous Solution by Adsorption onto Activated Carbon Prepared from Lapsi (Choerospondias axillaris) Seed Stone. Journal of the Institute of Engineering. 9, 1 (Jun. 2014), 166–174. DOI:https://doi.org/10.3126/jie.v9i1.10680.