TY  - JOUR
AU  - Adrian Ioana
AU  - Alexander S. Kechris
AU  - Todor Tsankov
TI  - Subequivalence relations and positive-definite functions
JO  - Groups, geometry, and dynamics
PY  - 2009
SP  - 579
EP  - 625
VL  - 3
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4171/ggd/71/
DO  - 10.4171/ggd/71
ID  - 10_4171_ggd_71
ER  -