@article{05142082,
title = {Dirichlet forms for general Wentzell boundary conditions, analytic semigroups, and cosine operator functions.},
journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]},
volume = {2006},
year = {2006},
zbl = {1117.47036},
language = {en},
url = {http://dml.mathdoc.fr/item/05142082}
}
Mugnolo, Delio; Romanelli, Silvia. Dirichlet forms for general Wentzell boundary conditions, analytic semigroups, and cosine operator functions.. Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 2006 (2006) . http://gdmltest.u-ga.fr/item/05142082/