1. Martens, H., Naes, T.: Trends Anal. Chem. 3, 204 (1984)
2. Naes, T., Martens, H.: ibid. 3, 266 (1984)
3. Brown, P. J.: J. R. Stat. Soc. B. 44, 287 (1982)
4. Grotch, S. L.: Three-Dimensional Graphics for Scientific Data Display and Data Analysis, in: Chemometrics, Mathematics and Statistics in Chemistry (Kowalski, B. R., ed.), p. 439, Reidel, Dordrecht 1984
5. Malinowski, E. R., Howery, D. G.: Factor Analysis in Chemistry, Wiley Interscience, New York 1980