@article{1077244245, author = {Friedman, Joel}, title = {Minimum higher eigenvalues of Laplacians on graphs}, journal = {Duke Math. J.}, volume = {85}, number = {1}, year = {1996}, pages = { 1-18}, language = {en}, url = {http://dml.mathdoc.fr/item/1077244245} }
Friedman, Joel. Minimum higher eigenvalues of Laplacians on graphs. Duke Math. J., Tome 85 (1996) no. 1, pp. 1-18. http://gdmltest.u-ga.fr/item/1077244245/