@article{JAC_2015__42_2_a4,
     author = {Omidi, G. R.},
     title = {A spectral excess theorem for normal digraphs},
     journal = {Journal of Algebraic Combinatorics},
     pages = {537--554},
     publisher = {mathdoc},
     volume = {42},
     number = {2},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2015__42_2_a4/}
}