@article{1103036720, author = {Horn, Alfred}, title = {Eigenvalues of sums of Hermitian matrices.}, journal = {Pacific J. Math.}, volume = {12}, number = {4}, year = {1962}, pages = { 225-241}, language = {en}, url = {http://dml.mathdoc.fr/item/1103036720} }
Horn, Alfred. Eigenvalues of sums of Hermitian matrices.. Pacific J. Math., Tome 12 (1962) no. 4, pp. 225-241. http://gdmltest.u-ga.fr/item/1103036720/