Mastuti, Sri, et al. “Nigella Sativa Seed Extract Ointment Increasing the Amount of Healing Fibroblast and Collagen on Balb C Mice”. Sains Medika: Jurnal Kedokteran Dan Kesehatan, vol. 8, no. 1, Apr. 2017, pp. 15-19, https://doi.org/10.30659/sainsmed.v8i1.1006.