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[2] Kubáček L.: Foundations of Estimation Theory. Elsevier, Amsterdam-Oxford-New York-Tokyo, 1988. MR 0995671

[3] Kubáčková L., Kubáček L.: Elimination Transformation of an Observation Vector preserving Information on the First and Second Order Parameters. Technical Report, Institute of Geology, University of Stuttgard, No 11, (1990), 1-71.

[4] Nordström K., Fellman J.: Characterizations and Dispersion-Matrix Robustness of Efficiently Estimable Parametric Functionals in Linear Models with Nuisance Parameters. Linear Algebra and its Applications 127 (1990), 341-361. MR 1048807 | Zbl 0709.62063