@Article{ KreLeoVla18, author = { Krejcirik, David and Leonardi, Gian Paolo and Vlachopulos, Petr }, title = { The Cheeger constant of curved tubes }, journal = { Arkiv der Mathematik }, year = { 2018 }, pages = { }, URL = { http://cvgmt.sns.it/paper/4196/ }, note = { cvgmt preprint} }