@article{1102982796,
author = {Howland, James S.},
title = {Embedded eigenvalues and virtual poles.},
journal = {Pacific J. Math.},
volume = {31},
number = {3},
year = {1969},
pages = { 565-582},
language = {en},
url = {http://dml.mathdoc.fr/item/1102982796}
}
Howland, James S. Embedded eigenvalues and virtual poles.. Pacific J. Math., Tome 31 (1969) no. 3, pp. 565-582. http://gdmltest.u-ga.fr/item/1102982796/