@article{1256054217,
author = {Putnam, C. R.},
title = {Eigenvalues and boundary spectra},
journal = {Illinois J. Math.},
volume = {12},
number = {4},
year = {1968},
pages = { 278-282},
language = {en},
url = {http://dml.mathdoc.fr/item/1256054217}
}
Putnam, C. R. Eigenvalues and boundary spectra. Illinois J. Math., Tome 12 (1968) no. 4, pp. 278-282. http://gdmltest.u-ga.fr/item/1256054217/