Affandi, Biran, Tjeerd Korver, T.B. Paul Geurts, H.J.T. Coelingh Bennink, and W. Gadroen. 1999. “A Phase II Study With a Single Implant Contraceptive Containing 3-Ketodesogestrel (Implanon®): Efficacy and Safety”. Medical Journal of Indonesia 8 (1):25-30. https://doi.org/10.13181/mji.v8i1.674.