%0 Journal Article %A Laurent Bartholdi %A Dzmitry Dudko %T Algorithmic aspects of branched coverings I/V. Van Kampen’s theorem for bisets %J Groups, geometry, and dynamics %D 2018 %P 121-172 %V 12 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4171/ggd/441/ %R 10.4171/ggd/441 %F 10_4171_ggd_441