Geodesic
Minimal sufficient statistics for the normal models with an algebraic structure
Teoriâ veroâtnostej i ee primeneniâ, Tome 26 (1981) no. 3, pp. 574-583 
Е. A. Puhal'skiǐ. Minimal sufficient statistics for the normal models with an algebraic structure. Teoriâ veroâtnostej i ee primeneniâ, Tome 26 (1981) no. 3, pp. 574-583. http://geodesic.mathdoc.fr/item/TVP_1981_26_3_a9/
@article{TVP_1981_26_3_a9,
     author = {{\CYRE}. A. Puhal'skiǐ},
     title = {Minimal sufficient statistics for the normal models with an algebraic structure},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {574--583},
     year = {1981},
     volume = {26},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TVP_1981_26_3_a9/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

For a normal linear mixed statistical structure with a special algebraic structure the simple complete and/or minimal sufficients statistics are obtained. A class of equivariant estimates of the model's parameters is described and the optimal (in this class) estimates are determined.