Yincharoen, K., Jitjum, S., Laohaprapanon, S., Pathumrattanarote, N. and Pittagit, K. 2021. The effectiveness of applied herbal gels containing herbal extracts for primary dysmenorrhea treatment. Journal of Medicine and Public Health, Ubon Ratchathani University. 5, 1 (Dec. 2021), 1–10.