Oungkulsolmongkol, T., P. . Salee-art, and W. Buggakupta. “Hardness and Fracture Toughness of Alumina-Based Particulate Composites With Zirconia and Strontia Additives”. Journal of Metals, Materials and Minerals, vol. 20, no. 2, Apr. 2017, https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/212.