Darmadi, D., T. S. Choong, C. T.G, R. Yunus, and Y. T. Yap. “Adsorption of Methylene Blue from Aqueous Solutions on Carbon Coated Monolith”. ASEAN Journal of Chemical Engineering, Vol. 8, no. 1, Dec. 2008, pp. 26-37, https://jurnal.ugm.ac.id/v3/AJChE/article/view/7696.