Si, Shengzhu, Liping Wang, Wa Si, and Xiongzi Dong. “Application of Wavelet Transform-Principal Component Regression Method for Simultaneous Determination of Colourants in Ternary Mixtures Using Spectrophotometry”. Asian Journal of Chemistry 24, no. 4 (December 13, 2011): 1449–1452. Accessed July 9, 2024. https://asianpubs.org/index.php/ajchem/article/view/8836.