@article{10_4171_ggd_85,
     author = {Soyoung Moon},
     title = {Amenable actions of amalgamated free products},
     journal = {Groups, geometry, and dynamics},
     pages = {309--332},
     year = {2010},
     volume = {4},
     number = {2},
     doi = {10.4171/ggd/85},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/85/}
}