Circumferential buckling of a hydrogel tube emptying upon dehydration M. Curatolo, F. Lisi, G. Napoli and P. Nardinocchi Eur. Phys. J. Plus, 138 5 (2023) 382 Published online: 04 May 2023 DOI: 10.1140/epjp/s13360-023-03953-y