@article{10_4153_CJM_2002_020_1,
     author = {Li, Chi-Kwong and Poon, Yiu-Tung},
     title = {Diagonals and {Partial} {Diagonals} of {Sum} of {Matrices}},
     journal = {Canadian journal of mathematics},
     pages = {571--594},
     year = {2002},
     volume = {54},
     number = {3},
     doi = {10.4153/CJM-2002-020-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2002-020-1/}
}