Andrianny Murshidi, J., N. Umor, M. Khairul Tazril, and M. Yusoff M.S. “Physical and Morphological Properties of Zirconia Produced at Different Precipitating Conditions”. Malaysian Journal of Science, vol. 21, Dec. 2002, pp. 97-99, https://ejournal.um.edu.my/index.php/MJS/article/view/8864.