@Misc{ GaPaPiSa21, author = { Gavitone, Nunzia and Paoli, Gloria and Piscitelli, Gianpaolo and Sannipoli, Rossano }, title = { An isoperimetric inequality for the first Steklov-Dirichlet Laplacian eigenvalue of convex sets with a spherical hole }, journal = { }, year = { 2021 }, pages = { }, URL = { http://cvgmt.sns.it/paper/5727/ }, note = { cvgmt preprint} }