Geladi, Paul, and Bruce R. Kowalski. “Partial Least-Squares Regression: A Tutorial”. Analytica Chimica Acta, vol. 185, 1986, pp. 1-17, https://doi.org/10.1016/0003-2670(86)80028-9.
Geladi, P., & Kowalski, B. R. (1986). Partial least-squares regression: a tutorial. Analytica Chimica Acta, 185, 1-17. https://doi.org/10.1016/0003-2670(86)80028-9