@article{10_4153_CMB_1974_076_1,
     author = {Brand, Daniel},
     title = {When is a {Matrix} {Positive}},
     journal = {Canadian mathematical bulletin},
     pages = {409--410},
     year = {1974},
     volume = {17},
     number = {3},
     doi = {10.4153/CMB-1974-076-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-076-1/}
}