@article{1102735920, author = {Pinsky, Mark A.}, title = {On the spectrum of Cartan-Hadamard manifolds.}, journal = {Pacific J. Math.}, volume = {97}, number = {2}, year = {1981}, pages = { 223-230}, language = {en}, url = {http://dml.mathdoc.fr/item/1102735920} }
Pinsky, Mark A. On the spectrum of Cartan-Hadamard manifolds.. Pacific J. Math., Tome 97 (1981) no. 2, pp. 223-230. http://gdmltest.u-ga.fr/item/1102735920/