@article{BASS_2017_42_1_a0,
     author = {Ivan Gutman},
     title = {On {hyper-Zagreb} index and coindex},
     journal = {Bulletin de l'Acad\'emie serbe des sciences. Classe des sciences math\'ematiques et naturelles},
     pages = {1 - 8},
     publisher = {mathdoc},
     volume = {42},
     number = {1},
     year = {2017},
     url = {http://geodesic.mathdoc.fr/item/BASS_2017_42_1_a0/}
}