H. Paudyal, K. Inoue, and B. Pangeni, “Recovery of Potassium from Incineration Ash of Chicken Dropping (IACD) by Sulphuric Acid Leaching Followed by Adsorption Using Orange Waste Gel”, J. Nepal Chem. Soc., vol. 42, no. 1, pp. 99–106, Mar. 2021.