@article{GT_2003_7_1_a9,
     author = {Guirardel, Vincent},
     title = {A very short proof of {Forester{\textquoteright}s} rigidity result},
     journal = {Geometry & topology},
     pages = {321--328},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {2003},
     doi = {10.2140/gt.2003.7.321},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2003.7.321/}
}