Affandi, B. et al. 1999. A multicentred phase III comparative study between single-implant containing 3-ketodesogestrel (Implanon®) and implants containing levonorgestrel (Norplant®) II. Vaginal bleeding patterns. Medical Journal of Indonesia. 8, 1 (Jan. 1999), 56–61. DOI:https://doi.org/10.13181/mji.v8i1.678.