@Article{ Sar19a, author = { Saracco, Giorgio }, title = { A sufficient criterion to determine planar self-Cheeger sets }, journal = { J. Convex Anal. }, year = { 2021 }, volume = { 28 }, number = { 3 }, pages = { 951--958 }, URL = { http://cvgmt.sns.it/paper/4348/ }, note = { cvgmt preprint} }