HANNA BOIKO; DR. ANNA KOSTEVICH. Gray Hair and Hair Strengthening: A Professional Guide for Hairdressers and Colorists. American Scientific Research Journal for Engineering, Technology, and Sciences, Jordan, v. 104, n. 1, p. 29–38, 2026. Disponível em: https://asrjetsjournal.org/American_Scientific_Journal/article/view/12168. Acesso em: 8 feb. 2026.