@article{RCM_2016_50_2_a3,
     author = {J. A. de la Pe\~na and J. Rada},
     title = {On the energy of symmetric matrices and {Coulson's} integral formula},
     journal = {Revista colombiana de matematicas},
     pages = {173--186},
     publisher = {mathdoc},
     volume = {50},
     number = {2},
     year = {2016},
     url = {http://geodesic.mathdoc.fr/item/RCM_2016_50_2_a3/}
}