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), pp. 166–174. doi: 10.3126/jie.v9i1.10680.