Ghosh, D., and M. M. . Dhandha. “Investigation of Sun Protection Factor (SPF) of Raspberry Seed Oil, Niacinamide and Zinc Oxide in Combination for Their Possible Use in a Sunscreen Formulation”. SKIN The Journal of Cutaneous Medicine, vol. 8, no. 5, Sept. 2024, pp. 1807-14, doi:10.25251/skin.8.5.4.