@article{00152067,
title = {On the numbers of positive and negative eigenvalues of a graph.},
journal = {Publications de l'Institut Math\'ematique. Nouvelle S\'erie},
volume = {52(66)},
year = {1992},
pages = {25-28},
zbl = {0786.05058},
language = {en},
url = {http://dml.mathdoc.fr/item/00152067}
}
Torgašev, Aleksandar. On the numbers of positive and negative eigenvalues of a graph.. Publications de l'Institut Mathématique. Nouvelle Série, Tome 52(66) (1992) pp. 25-28. http://gdmltest.u-ga.fr/item/00152067/