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@article{MET_1991__38_2_176371, author = {A. Shapiro and M.W. Browne}, title = {Invariance of {Covariance} {Structures} {Under} {Groups} of {Transformations.}}, journal = {Metrika}, pages = {345--355}, publisher = {mathdoc}, volume = {38}, number = {2}, year = {1991}, zbl = {0757.62004}, url = {http://geodesic.mathdoc.fr/item/MET_1991__38_2_176371/} }
A. Shapiro; M.W. Browne. Invariance of Covariance Structures Under Groups of Transformations.. Metrika, Tome 38 (1991) no. 2, pp. 345-355. http://geodesic.mathdoc.fr/item/MET_1991__38_2_176371/