@article{1103036923,
author = {Kreith, Kurt},
title = {The spectrum of singular self-adjoint elliptic operators.},
journal = {Pacific J. Math.},
volume = {11},
number = {4},
year = {1961},
pages = { 1401-1405},
language = {en},
url = {http://dml.mathdoc.fr/item/1103036923}
}
Kreith, Kurt. The spectrum of singular self-adjoint elliptic operators.. Pacific J. Math., Tome 11 (1961) no. 4, pp. 1401-1405. http://gdmltest.u-ga.fr/item/1103036923/