@article{1102968685, author = {Botta, Peter}, title = {Matrix inequalities and kernels of linear transformations.}, journal = {Pacific J. Math.}, volume = {43}, number = {3}, year = {1972}, pages = { 285-289}, language = {en}, url = {http://dml.mathdoc.fr/item/1102968685} }
Botta, Peter. Matrix inequalities and kernels of linear transformations.. Pacific J. Math., Tome 43 (1972) no. 3, pp. 285-289. http://gdmltest.u-ga.fr/item/1102968685/