@article{GDZPPN002108275,
title = {Bounding the complexity of simplicial group actions on trees.},
journal = {Inventiones mathematicae},
volume = {104},
year = {1991},
pages = {449-470},
zbl = {0724.20019},
url = {http://dml.mathdoc.fr/item/GDZPPN002108275}
}
Bestvina, Mladen; Feighn, Mark. Bounding the complexity of simplicial group actions on trees.. Inventiones mathematicae, Tome 104 (1991) pp. 449-470. http://gdmltest.u-ga.fr/item/GDZPPN002108275/