Al Qassar , Sarmad S. Salih, Ghada A. Taqa, and Israa R. Al Kasso. “Determination of Coffee Extract Level in Saliva Orthodontic Patient”. Al-Salam Journal for Medical Science 2, no. 2 (March 25, 2023): 1–6. Accessed September 22, 2024. http://journal.alsalam.edu.iq/index.php/ajbms/article/view/67.