D. N. Purboningtyas, C. J. Lumbantobing, and Y. E. P. Lubis, “The Effect of Administration of Rosella Flower (Hibiscus Sabdariffa) Extract Gel on The Expression Of TNF-α And Caspase-3 Expression in An In Vivo Study of Wistar Strain Rats Exposed to Ultraviolet B-Lights”, Int Jou of PHE, vol. 3, no. 2, pp. 570–580, Feb. 2024.