1. Linear dynamic recursive estimation from the viewpoint of regression analysis;Duncan;J. Am. Stat. Assoc.,1972
2. Recursive estimation using mixed linear models with autoregressive random effects. Variance components and animal breeding;Harville,1979
3. Henderson, C. R. 1963. Selection index and expected genetic advance. Page 141 in Statistical genetics and plant breeding. W. D. Hanson and H. F. Robinson, ed. Natl. Acad. Sci., Natl, Res. Counc. Publ. 982. Washington, DC.
4. Use of relationships among sires to increase accuracy of sire evaluation;Henderson;J. Dairy Sci.,1975
5. A new approach to linear filtering and prediction problems;Kalman;J. Basic Eng.,1960