Prado, G., R. Teplitz, R. Winkelmann, J. Del Rosso, and D. Rigel. “Clinical Efficacy & Safety of Oral Polypodium Leucotomos Extract for Photoprotection: A Systematic Review”. SKIN The Journal of Cutaneous Medicine, vol. 2, no. 6, Nov. 2018, doi:10.25251/skin.2.6.2.