@article{05005332, title = {On the coefficients of the Laplacian characteristic polynomial of trees.}, journal = {Bulletin. Classe des Sciences Math\'ematiques et Naturelles. Sciences Math\'ematiques}, volume = {127}, year = {2003}, pages = {31-40}, doi = {10.2298/BMAT0328031G}, zbl = {1080.05519}, language = {en}, url = {http://dml.mathdoc.fr/item/05005332} }
Gutman, I.; Pavlović, Ljiljana. On the coefficients of the Laplacian characteristic polynomial of trees.. Bulletin. Classe des Sciences Mathématiques et Naturelles. Sciences Mathématiques, Tome 127 (2003) pp. 31-40. doi : 10.2298/BMAT0328031G. http://gdmltest.u-ga.fr/item/05005332/