Alimuddin (2024) “The Quality Study of Hydroxyapatite (HAp)-TiO2 Composites from Pokea (Batissa violacea var. celebensis) Shell Waste by Hydrothermal, Microwave and Precipitation Methods”, Engineering And Technology Journal, 9(11), pp. 5489–5494. doi: 10.47191/etj/v9i11.05.