Equienergetic graphs Harishchandra S. Ramane; Hanumappa B. Walikar; Siddani Bhaskara Rao; B. Devadas Acharya; Prabhakar R. Hampiholi; Sudhir R. Jog; Ivan Gutman — 2004 Kragujevac Journal of Mathematics
Bounds for the distance energy of a graph Harishchandra S. Ramane; Deepak S. Revankar; Ivan Gutman; Siddani Bhaskara Rao; B. Devadas Acharya; Hanumappa B. Walikar — 2008 Kragujevac Journal of Mathematics