Amano, K., Moriyama, H., Shimada, K., & Matsumura, G. (2013). Study of human adult parotid duct in the area of penetration through buccinator muscle and their functional relationship as a sphincter. Italian Journal of Anatomy and Embryology, 118(1), 6–18. Retrieved from https://oajournals.fupress.net/index.php/ijae/article/view/1139