@article{10_26493_1855_3974_682_065,
     author = {Irena M. Jovanovi\'c},
     title = {
		{Non-negative} spectrum of a digraph
	},
     journal = {Ars Mathematica Contemporanea},
     pages = {167--182},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {2017},
     doi = {10.26493/1855-3974.682.065},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.26493/1855-3974.682.065/}
}