@article{MOMA_1997__123_1_178770,
     author = {K. Schmidt and P. Gabriel and M. Lemanczyk},
     title = {Extensions of {Cocycles} for {Hyperfinite} {Actions} and {Applications.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {209--228},
     publisher = {mathdoc},
     volume = {123},
     number = {1},
     year = {1997},
     zbl = {0887.28008},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1997__123_1_178770/}
}