@article{1214433846, author = {Ralston, J. V.}, title = {Approximate eigenfunctions of the Laplacian}, journal = {J. Differential Geom.}, volume = {12}, number = {1}, year = {1977}, pages = { 87-100}, language = {en}, url = {http://dml.mathdoc.fr/item/1214433846} }
Ralston, J. V. Approximate eigenfunctions of the Laplacian. J. Differential Geom., Tome 12 (1977) no. 1, pp. 87-100. http://gdmltest.u-ga.fr/item/1214433846/