Yoon Jung, J., Hoon Kwon, H., Soo Hong, J., Young Yoon, J., Sun Park, M., Young Jang, M. and Hun Suh, D. (2014) “Effect of Dietary Supplementation with Omega-3 Fatty Acid and Gamma-linolenic Acid on Acne Vulgaris: A Randomised, Double-blind, Controlled Trial”, Acta Dermato-Venereologica, 94(5), pp. 521–525. doi: 10.2340/00015555-1802.