Mustafa, H. M., F. M. Isah, S. Hayat, and M. Mustapha. “Influence of 9% Sodium Hydroxide Solution on Kaolinite Clay”. Faculty of Natural and Applied Sciences Journal of Scientific Innovations, vol. 5, no. 4, Mar. 2024, pp. 119-24, https://fnasjournals.com/index.php/FNAS-JSI/article/view/313.