1. M. A. Sharaf , D. L.Illman, and B. R.Kowalski, Chemometrics, Wiley, New York, 1986.
2. L. E. Wangen , E. J.Peterson, W. B.Hutchinson, and L. S.Levinson, in Environmental Applications of Chemometrics, eds. Breen, J. J., and Robinson, P. E., ACS Symposium Series, American Chemical Society, Washington, DC, 1985, vol 292, pp. 53–68.
3. T. W. Shattuk , M. S.Germani, and P. R.Buseck, in Environmental Application of Chemometrics, eds. Breen, J. J., and Robinson, P. E., ACS Symposium Series, American Chemical Society, Washington, DC, 1985, vol. 292, pp. 118–129.
4. Classification of archaeological artifacts by applying pattern recognition to trace element data