Jong, T. S., C. Y. Yoo, and P. L. Kiew. “Feasibility Study of Methylene Blue Adsorption Using Magnetized Papaya Seeds”. Progress in Energy and Environment, vol. 14, no. 1, Sept. 2020, pp. 1-12, https://akademiabaru.com/submit/index.php/progee/article/view/909.