S. G. D. Iya, M. Z. Noh, S. N. A. Razak, and N. A. A. Kutty, “Physico-Mechanical Properties of Porcelain by Substitution of Quartz with POFA Treated with 2M Hcl Acid”, IJET, vol. 7, no. 4.30, pp. 141–144, Nov. 2018, doi: 10.14419/ijet.v7i4.30.22081.