@article{1256049514, author = {Donnelly, Harold}, title = {Spectral invariants of the second variation operator}, journal = {Illinois J. Math.}, volume = {21}, number = {4}, year = {1977}, pages = { 185-189}, language = {en}, url = {http://dml.mathdoc.fr/item/1256049514} }
Donnelly, Harold. Spectral invariants of the second variation operator. Illinois J. Math., Tome 21 (1977) no. 4, pp. 185-189. http://gdmltest.u-ga.fr/item/1256049514/