%0 Journal Article %A Brualdi, R. A. %T Convex Sets of Non-Negative Matrices %J Canadian journal of mathematics %D 1968 %P 144-157 %V 20 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-016-9/ %R 10.4153/CJM-1968-016-9 %F 10_4153_CJM_1968_016_9