1. De Smet, J. A. (1993). Development of multivariate specification limits using partial least squares regression. McMaster University.
2. Establishing multivariate specification regions for incoming materials;Duchesne;Journal of Quality Technology,2004
3. Eriksson, I., Johansson, E., N. Kettaneh-Wold, N. and Wold, S. (2001). Multi- and Megavariate Data Analysis. Principles and Applications. Umetrics Academy, UmeD
4. Grjotheim, K. (2010). Introduction to aluminium electrolysis: Understanding the Hall-Héroult process, Alu Media, DSseldorf.
5. Jentoftsen, T. E., Linga, H., Holden, I., Aga, B. E., Christensen, V. G. and Hoff, F. (2009). Correlation between anode properties and cell performance. In: Bearne, G., ed. Light Metals, 2009 Warrendale. Minerals, Metals & Materials Soc, 301-304.