E. Özkaya, V. Korkmaz, O. F. Kara, and T. Küçüközkan, “Educational Status Number of Previous Contraceptive Failure Do not Effect the Women’s Contraceptive Preference After Surgical Abortion in Turkey”, Gynecol Obstet Reprod Med, vol. 16, no. 2, pp. 98–102, Aug. 2010.