Cai, Tongxiang, Yanwei Zeng, Ling Wang, Shilong Yin, and Chuanming Li. 2012. “Synthesis of Oxyapatite La9.33Si6O26 Nanocrystals via Solvothermal Method”. Asian Journal of Chemistry 24 (11):4855-57. https://asianpubs.org/index.php/ajchem/article/view/9780.