@article{02017792, title = {A very short proof of Forester's rigidity result.}, journal = {Geometry \& Topology}, volume = {7}, year = {2003}, pages = {321-328}, doi = {10.2140/gt.2003.7.321}, zbl = {1032.20018}, language = {en}, url = {http://dml.mathdoc.fr/item/02017792} }
Guirardel, Vincent. A very short proof of Forester's rigidity result.. Geometry & Topology, Tome 7 (2003) pp. 321-328. doi : 10.2140/gt.2003.7.321. http://gdmltest.u-ga.fr/item/02017792/