%0 Journal Article %A Singaraj K. Ayyaswamy %A Selvaraj Balachandran %A Ivan Gutman %T On second-stage spectrum and energy of a graph %J Kragujevac Journal of Mathematics %D 2010 %P 139 %V 34 %I mathdoc %U http://geodesic.mathdoc.fr/item/KJM_2010_34_a11/ %G en %F KJM_2010_34_a11