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@article{PIM_1992_N_S_51_65_a2, author = {Aleksandar Torga\v{s}ev}, title = {On the {Numbers} of {Positive} and {Negative} {Eigenvalues} of a {Graph}}, journal = {Publications de l'Institut Math\'ematique}, pages = {25 }, publisher = {mathdoc}, volume = {_N_S_51}, number = {65}, year = {1992}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PIM_1992_N_S_51_65_a2/} }
Aleksandar Torgašev. On the Numbers of Positive and Negative Eigenvalues of a Graph. Publications de l'Institut Mathématique, _N_S_51 (1992) no. 65, p. 25 . http://geodesic.mathdoc.fr/item/PIM_1992_N_S_51_65_a2/