1. T.W. Anderson, An Introduction to Multivariate Statistical Analysis, 2nd Edition. John Wiley &, Sons, New York, 1984.
2. W.W. Cooley and P.R. Lohnes, Multivariate Data Analysis, John Wiley & Sons, New York, 1971.
3. K. Conradsen and A.A. Nielsen, “Multivariate change detection in multispectral, multitemporal images”, Abstracts and Notes from Seminar on Near Real-Time Remote Sensing for Land and Ocean Applications, Eurimage and ESA/Earthnet, Rome, Italy, 1991.
4. T. Fung and E. LeDrew, “Application of principal components analysis to change detection”, Photogrammetric Engineering and Remote Sensing, vol. 53, no. 12, pp. 1649–1658, 1987.
5. P. Gong, “Change detection using principal component analysis and fuzzy set theory”, Canadian Journal of Remote Sensing, vol. 19, no. 1, pp. 22–29, 1993.