@article{10_4171_ggd_56,
     author = {Yves de Cornulier},
     title = {Infinite conjugacy classes in groups acting on trees},
     journal = {Groups, geometry, and dynamics},
     pages = {267--277},
     year = {2009},
     volume = {3},
     number = {2},
     doi = {10.4171/ggd/56},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/56/}
}