@article{GDZPPN001265245,
title = {Noncoercive boundary value problems for the Lapace equation with a spectral parameter.},
journal = {Semigroup forum},
volume = {53},
year = {1996},
pages = {298-316},
zbl = {0857.35095},
url = {http://dml.mathdoc.fr/item/GDZPPN001265245}
}
Yakubov, S.Ya. Noncoercive boundary value problems for the Lapace equation with a spectral parameter.. Semigroup forum, Tome 53 (1996) pp. 298-316. http://gdmltest.u-ga.fr/item/GDZPPN001265245/