N. Hikmah, J. J. Nugroho, N. Natsir, C. A. Rovani, and L. Mooduto, “Enamel remineralization after extracoronal bleaching using nano-hydroxyapatite (nha) from synthesis results of blood clam (anadara granosa) shells”, J Dentomaxillofac Sci, vol. 4, no. 1, pp. 28–31, Apr. 2019.