@Article{ Til10a, author = { Tilli, Paolo }, title = { Isoperimetric inequalities for convex hulls and related questions }, journal = { Trans. Amer. Math. Soc. }, year = { 2010 }, volume = { 362 }, number = { 9 }, pages = { 4497-4509 }, URL = { http://cvgmt.sns.it/paper/2036/ }, note = { cvgmt preprint} }