1. Best quadratic unbiased estimation in variance component models;Drygas;Math. Operationsforsch. Statist. Ser. Statist.,1977
2. A new proof of Hsu's theorem in regression analysis-a coordinatefree approach;Drygas;Math. Operationsforsch. Statist. Ser. Statist.,1977
3. On the best unbiased estimate of variance;Hsu;Statist. Res. Mem.,1938
4. Simultaneous estimation of expectation and covariance matrix in linear models;Kleffe;Math. Operationsforsch. Statist. Ser. Statist.,1978
5. Optimal estimation of variance components-a survey;Kleffe;Sankhyā Ser. B,1977