1. Estimation of principal components and related models by iterative least squares. In Multivariate Analysis, (ed.). Academic Press: New York, 1966; 391-420.
2. The Collinearity Problem in Linear Regression. The Partial Least Squares (PLS) Approach to Generalized Inverses
3. Implications of factor analysis of three-way matrices for measurement of change. In Problems in Measuring Change, (ed.). University of Wisconsin Press: Madison, WI, 1963; 122-137.
4. The extension of factor analysis to three dimensional matrices. In Contributions to Mathematical Psychology. (eds). Holt, Reinhart and Winston: New York, 1964; 100-127.
5. Some mathematical notes on three-mode factor analysis