Halpern, Andrea. “Absolute Pitch in Naturalistic Singing: A Commentary on Olthof Et Al. (2015)”. Empirical Musicology Review 10, no. 3 (September 23, 2015): 175–177. Accessed April 29, 2026. https://www.osu.tests.sfulib4.publicknowledgeproject.org/index.php/EMR/article/view/4904.