Clifford, David, and Glenn Stone. “Variable Penalty Dynamic Time Warping Code for Aligning Mass Spectrometry Chromatograms in R”. Journal of Statistical Software 47, no. 8 (April 25, 2012): 1–17. Accessed May 3, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v047i08.