@article{05282497, title = {Spectral theory from the second-order }, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2007}, year = {2007}, doi = {10.1155/2007/16595}, zbl = {1147.47026}, language = {en}, url = {http://dml.mathdoc.fr/item/05282497} }
Dhaouadi, Lazhar. Spectral theory from the second-order . International Journal of Mathematics and Mathematical Sciences, Tome 2007 (2007) . doi : 10.1155/2007/16595. http://gdmltest.u-ga.fr/item/05282497/