Hamdi Karaoglu, M., and Mehmet Ugurlu. “Adsorption and Recovery of Methylene Blue from Aqueous Solution by NaOH-Treated of Prina”. Asian Journal of Chemistry, vol. 23, no. 6, Mar. 2011, pp. 2577-83, https://asianpubs.org/index.php/ajchem/article/view/10418.