Ozturan, Orhan, and James Jerger. “Distortion Product Otoacoustic Emissions and Clinical Significance of Primary Stimulus Levels”. Annals of Medical Research 2, no. 1 (May 25, 2021): 0022–0027. Accessed December 22, 2024. http://annalsmedres.org/index.php/aomr/article/view/2394.