Wagito, W., Lubis, S., Deliana, M. and Hakimi, H. 2011. Effectiveness of vitamin E as a treatment of primary dysmenorrhea in pubertal adolescents. Paediatrica Indonesiana. 51, 1 (Feb. 2011), 41-6. DOI:https://doi.org/10.14238/pi51.1.2011.41-6.