@article{IM_1985__82_143297,
     author = {E. Ghys},
     title = {Actions localement libres du groupe affine.},
     journal = {Inventiones mathematicae},
     pages = {479--526},
     publisher = {mathdoc},
     volume = {82},
     year = {1985},
     zbl = {0577.57010},
     url = {http://geodesic.mathdoc.fr/item/IM_1985__82_143297/}
}