@Article{ TilZuc15, author = { Tilli, Paolo and Zucco, Davide }, title = { Where Best to Place a Dirichlet Condition in an Anisotropic Membrane? }, journal = { SIAM J. Math. Anal. }, year = { 2015 }, volume = { 47 }, number = { 4 }, pages = { 2699–2721 }, URL = { http://cvgmt.sns.it/paper/3834/ }, note = { cvgmt preprint} }