@article{10_4064_fm203_1_4,
     author = {Greg Hjorth},
     title = {Mixing actions of groups with
 the {Haagerup} approximation property},
     journal = {Fundamenta Mathematicae},
     pages = {47--56},
     publisher = {mathdoc},
     volume = {203},
     number = {1},
     year = {2009},
     doi = {10.4064/fm203-1-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm203-1-4/}
}