Rizany, Selly, et al. “Serum Vitamin D Levels, Visual Analog Scale Dysmenorrhea Score, and Endometriosis ASRM Classification: A Relationship Study”. Indonesian Journal of Obstetrics and Gynecology, vol. 12, no. 1, Jan. 2024, pp. 46-54, doi:10.32771/inajog.v12i1.1947.