@article{ZNSL_2005_326_a6,
     author = {R. I. Grigorchuk and V. V. Nekrashevych},
     title = {Amenable actions of nonamenable groups},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {85--96},
     publisher = {mathdoc},
     volume = {326},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2005_326_a6/}
}