1. The Gauss–Markov theorem for regression models with possibly singular covariances;Albert;SIAM J. Appl. Math.,1978
2. Relationships between some representations of the best linear unbiased estimator in the general Gauss–Markoff model;Baksalary;SIAM J. Appl. Math.,1978
3. Symmetrizers of matrices;Baksalary;Linear Algebra Appl.,1981
4. The matrix inequality M⩾BMB*;Baksalary;Linear Algebra Appl.,1983
5. An extension of the generalized inverse of a matrix;Cline;SIAM J. Appl. Math.,1970