%0 Journal Article %A Molly Baird %A Sara Billey %A Erik Demaine %A Martin Demaine %A David Eppstein %A Sándor Fekete %A Graham Gordon %A Sean Griffin %A Joseph Mitchell %A Joshua Swanson %T Existence and hardness of conveyor belts %J The electronic journal of combinatorics %D 2020 %V 27 %N 4 %U http://geodesic.mathdoc.fr/articles/10.37236/9782/ %R 10.37236/9782 %F 10_37236_9782