@article{BASS_2002_27_a1,
     author = {B. Borovi\'canin and I. Gutman and M. Petrovi\'c},
     title = {Tetracyclic harmonic graphs},
     journal = {Bulletin de l'Acad\'emie serbe des sciences. Classe des sciences math\'ematiques et naturelles},
     pages = {19 },
     publisher = {mathdoc},
     volume = {27},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASS_2002_27_a1/}
}