zairina, R., and B. Utomo. “RELATIONSHIP BETWEEN DURATION AND REGULARITY OF MENSTRUAL CYCLE WITH PRIMARY DYSMENORRHEA IN ADOLESCENTS”. Indonesian Midwifery and Health Sciences Journal, vol. 7, no. 1, Jan. 2023, pp. 63-69, doi:10.20473/imhsj.v7i1.2023.63-69.