Lee, J., F. Leung, J. Satkunasingham, W. Wong, and W. Wong. “Structure and Correlation in the Detection of Melodic Sequences”. Canadian Acoustics, vol. 29, no. 3, Sept. 2001, pp. 114-5, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1407.