F. R. Batubara, G. L. A. Sirait, and L. N. Achmad, “Relationship between Menstrual Stress Levels and Menstrual Cycle in Medical Students”, J. Drug Delivery Ther., vol. 12, no. 4-S, pp. 140–146, Aug. 2022, doi: 10.22270/jddt.v12i4-S.5560.