1. Baksalary J. K. and Kala R.: 1981, Linear transformations preserving best linear unbiased estimators in a general Gauss-Markov model,Ann. Statist. 9, 913?916.
2. Drygas H.: 1983, Sufficiency and completeness in the general Gauss-Markov model,Sankky?, A 45(1), 88?98.
3. Drygas, H.: 1991/92, On an extension of the Girko equality in linear minimax estimation. Kasseler Mathematische Schriften 16/91,Proc. Probastat Conference, Bratislava, 26-30.08.1991, pp. 3?10
4. Drygas H.: 1992, Linear minimax estimation in a convex linear model?a paradoxon in decision theory?Statistics and Decision 10, 63?66.
5. Drygas H. and Pilz J.: 1996, On the equivalence of spectral theory and Bayesian analysis in minimax linear estimation,Acta. Appl. Math. 43, 43?57 (this issue).