@article{BASS_2020_45_1_a2,
     author = {Ivan Gutman},
     title = {Sombor index - one year later},
     journal = {Bulletin de l'Acad\'emie serbe des sciences. Classe des sciences math\'ematiques et naturelles},
     pages = {43 - 55},
     publisher = {mathdoc},
     volume = {45},
     number = {1},
     year = {2020},
     url = {http://geodesic.mathdoc.fr/item/BASS_2020_45_1_a2/}
}