Hanna Boiko, Dr. Anna Kostevich. Gray Hair and Hair Strengthening: A Professional Guide for Hairdressers and Colorists. ASRJETS-Journal [Internet]. 2026 Feb. 7 [cited 2026 Feb. 8];104(1):29-38. Available from: https://asrjetsjournal.org/American_Scientific_Journal/article/view/12168