1. Chatterjee, M. S. and Price, B., in Regression analysis by example. Wiley, New York, 1991
2. Montgomery, D. C. and Peck, E. A., in Introduction to Linear Regression Analysis. Wiley, New York, 1992
3. Combining global antithetic forecasts;Ridley;International Transactions in Operational Research,1995
4. Counterbalancing using unequal weights;Ridley;Production Planning and Control,1994
5. Generalized least squares for polynomial models;Bayhan;Neural Network World,1995