Ritter, Christian, and Jean Gilliard. “ImpuR: A Collection of Diagnostic Tools Developed in R in the Context of Peak Impurity Detection in HPLC-DAD But Potentially Useful With Other Types of Time-Intensity Matrices”. Journal of Statistical Software 18, no. 9 (January 11, 2007): 1–18. Accessed April 20, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v018i09.