@article{JEMS_2004_6_3_a0,
     author = {Matthew Foreman and Benjamin Weiss},
     title = {An anti-classification theorem for ergodic measure preserving transformations},
     journal = {Journal of the European Mathematical Society},
     pages = {277--292},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {2004},
     doi = {10.4171/jems/10},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/10/}
}