@article{ELA_2010__20__a42,
     author = {Shen, Shu-Qian and Huang, Ting-Zhu},
     title = {On symmetric matrices with exactly one positive eigenvalue},
     journal = {The electronic journal of linear algebra},
     pages = {158--167},
     publisher = {mathdoc},
     volume = {20},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2010__20__a42/}
}