@article{NSJOM_1990_20_2a_4,
     author = {Lepovi\'c Mirko},
     title = {Some results on the 

 reduced energy of graphs, {I}},
     journal = {Novi Sad Journal of Mathematics},
     pages = {43-52},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {1990},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1990_20_2a_4/}
}