Prasetyadi, Tjokro, et al. “CYTOTOXICITY OF IONS RELEASED FROM 17-4 PRECIPITATION HARDENING STAINLESS STEEL ORTHODONTIC BRACKETS IN ARTIFICIAL SALIVA”. International Journal of Applied Pharmaceutics, vol. 9, Jan. 2018, pp. 71-73, doi:10.22159/ijap.2017.v9s2.17.