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@article{CMUC_1976__17_2_a15, author = {Thompson, R. C.}, title = {A matrix inequality}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {393--397}, publisher = {mathdoc}, volume = {17}, number = {2}, year = {1976}, mrnumber = {0419482}, zbl = {0339.15008}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1976__17_2_a15/} }
Thompson, R. C. A matrix inequality. Commentationes Mathematicae Universitatis Carolinae, Tome 17 (1976) no. 2, pp. 393-397. http://geodesic.mathdoc.fr/item/CMUC_1976__17_2_a15/