“Effect of Music at 432 Hz and 440 Hz on Dental Anxiety and Salivary Cortisol Levels in Patients Undergoing Tooth Extraction: A Randomized Clinical Trial”. Journal of Applied Oral Science 28 (September 22, 2021): e20190601. Accessed June 2, 2024. https://www.periodicos.usp.br/jaos/article/view/190062.