@article{10_4153_CJM_2010_007_2,
     author = {Li, Chi-Kwong and Poon, Yiu-Tung},
     title = {Sum of {Hermitian} {Matrices} with {Given} {Eigenvalues:} {Inertia,} {Rank,} and {Multiple} {Eigenvalues}},
     journal = {Canadian journal of mathematics},
     pages = {109--132},
     year = {2010},
     volume = {62},
     number = {1},
     doi = {10.4153/CJM-2010-007-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2010-007-2/}
}