Guizzardi, S., J. Uggeri, P. Govoni, and R. Gatti. “Hyaluronic Acid Enhance Polynucleotides Effect on Cultured Dermal Fibroblasts”. Italian Journal of Anatomy and Embryology, vol. 116, no. 2, Nov. 2011, p. 90, https://oajournals.fupress.net/index.php/ijae/article/view/4664.