Affandi, B., S. K. Suherman, T. Korver, T. Paul Geurts, and H. Coelingh Bennink. “A Pharmacokinetic and Pharmacodynamic Study With a Single Implant Containing 3-Ketodesogestrel (Implanon®)”. Medical Journal of Indonesia, vol. 8, no. 1, Jan. 1999, pp. 15-24, doi:10.13181/mji.v8i1.673.