@article{10_2298_BMAT0328031G,
     author = {I. Gutman and Ljiljana Pavlovi\'c},
     title = {On the coefficients of the {Laplacian} characteristic polynomial of trees},
     journal = {Bulletin de l'Acad\'emie serbe des sciences. Classe des sciences math\'ematiques et naturelles},
     pages = {31 },
     publisher = {mathdoc},
     volume = {28},
     year = {2003},
     doi = {10.2298/BMAT0328031G},
     zbl = {1080.05519},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/BMAT0328031G/}
}