GIRSANG, L. C. .; FACHRIAL, E. .; LISTER, I. N. E. . Effectiveness Test of Robusta Coffee (Coffea cenephora) Extract from North Sumatra in Collagen and Hydration Skin Level of Female Wistar Rattus norvegicus. American Scientific Research Journal for Engineering, Technology, and Sciences, [S. l.], v. 65, n. 1, p. 108–115, 2020. Disponível em: https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/5661. Acesso em: 19 apr. 2024.