%0 Journal Article %A Dario Ascari %T A fine property of Whitehead's algorithm %J Groups, geometry, and dynamics %D 2024 %P 235-264 %V 18 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4171/ggd/746/ %R 10.4171/ggd/746 %F 10_4171_ggd_746