Deriaty, T., Nasution, I. and Yusuf, M. 2018. Nickel ion release from stainless steel brackets in chlorhexidine and Piper betle Linn mouthwash. Dental Journal. 51, 1 (Mar. 2018), 5–9. DOI:https://doi.org/10.20473/j.djmkg.v51.i1.p5-9.