@article{JRAM_1994__455_153652,
     author = {Dietmar Bisch},
     title = {An example of an irreducible subfactor of the hyperfinite {II1} factor with rational, noninteger index.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {21--34},
     year = {1994},
     volume = {455},
     zbl = {0802.46073},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1994__455_153652/}
}