@article{02121215, title = {Some properties of Laplacian eigenvectors.}, journal = {Bulletin. Classe des Sciences Math\'ematiques et Naturelles. Sciences Math\'ematiques}, volume = {127}, year = {2003}, pages = {1-6}, doi = {10.2298/BMAT0328001G}, zbl = {1051.05059}, language = {en}, url = {http://dml.mathdoc.fr/item/02121215} }
Gutman, I. Some properties of Laplacian eigenvectors.. Bulletin. Classe des Sciences Mathématiques et Naturelles. Sciences Mathématiques, Tome 127 (2003) pp. 1-6. doi : 10.2298/BMAT0328001G. http://gdmltest.u-ga.fr/item/02121215/