@article{1102912467,
author = {Hewgill, Denton},
title = {On the eigenvalues of a second order elliptic operator in an unbounded domain.},
journal = {Pacific J. Math.},
volume = {55},
number = {2},
year = {1974},
pages = { 467-476},
language = {en},
url = {http://dml.mathdoc.fr/item/1102912467}
}
Hewgill, Denton. On the eigenvalues of a second order elliptic operator in an unbounded domain.. Pacific J. Math., Tome 55 (1974) no. 2, pp. 467-476. http://gdmltest.u-ga.fr/item/1102912467/