@article{10_1090_S0894_0347_05_00480_7,
     author = {Gaboriau, Damien and Popa, Sorin},
     title = {An uncountable family of nonorbit equivalent actions of {\ensuremath{\mathbb{F}}_{\ensuremath{\mathbb{n}}}}},
     journal = {Journal of the American Mathematical Society},
     pages = {547--559},
     year = {2005},
     volume = {18},
     number = {3},
     doi = {10.1090/S0894-0347-05-00480-7},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-05-00480-7/}
}