Noyce, Genevieve L., Mats B. K, and Peter Sollich. “Quantifying Shapes: Mathematical Techniques for Analysing Visual Representations of Sound and Music”. Empirical Musicology Review 8, no. 2 (October 24, 2013): 128–154. Accessed April 29, 2024. https://emusicology.org/index.php/EMR/article/view/3932.