1. Montgomery, D.C. (1996)Introduction to Statistical Quality Control, Wiley & Sons
2. Duke, P. (1992) KAT –A Knowledge Acquisition Technique, Methodology Manual, CK Design, UK
3. Issues in industrial advisory system development;Glassey;Trends Biotech.,2000
4. Principal Component Analysis;Joliffe,1986
5. A theoretical basis for the use of principal components models for monitoring multivariate processes;Wise;Process Control and Quality,1990