M, Daniel. Commentary on Shaffer et al.: A cluster analysis of harmony in the McGill Billboard dataset. Empirical Musicology Review, [S. l.], v. 14, n. 3-4, p. 163–166, 2020. DOI: 10.18061/emr.v14i3-4.7657. Disponível em: https://emusicology.org/index.php/EMR/article/view/7657. Acesso em: 22 jun. 2024.