@Article{ vanGit17, author = { Gittins, Katie and van den Berg, Michiel }, title = { On the number of Courant-sharp Dirichlet eigenvalues }, journal = { Journal of Spectral Theory }, year = { 2017 }, volume = { 6 }, pages = { 735-745 }, URL = { http://cvgmt.sns.it/paper/3719/ }, note = { cvgmt preprint} }