Lathifa, Nadhilla Nurayu, et al. “Effect of Calendula Officinalis L. Extract Emulgel on MMP-1 and MMP-9 Levels in UV-B-Exposed Male Wistar Rats”. International Journal of Health, Economics, and Social Sciences (IJHESS), vol. 8, no. 3, July 2026, p. 1105~1111, doi:10.56338/ijhess.v8i3.12439.