References
- Graybill , F. A. 1976 . Theory and Application of the Linear Model , North Scituate , Mass. : Duxbury Press .
- Lowerre , J. M. 1983 . “An Integral of the Bivariate Normal and an Application,” . The American Statistician , 37 : 235 – 236 .
- McElroy , F. 1967 . “A Necessary and Sufficient Condition That Ordinary Least Squares Estimators Be Best Linear Unbiased,” . Journal of the American Statistical Association , 62 : 1302 – 1304 .