@article{10_4153_CMB_2004_025_0,
     author = {Marwaha, Alka},
     title = {A {Geometric} {Characterization} of {Nonnegative} {Bands}},
     journal = {Canadian mathematical bulletin},
     pages = {257--263},
     year = {2004},
     volume = {47},
     number = {2},
     doi = {10.4153/CMB-2004-025-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2004-025-0/}
}