@article{IM_1981__64_142828,
     author = {John Smillie},
     title = {An {Obstruction} to the {Existence} of {Affine} {Structures.}},
     journal = {Inventiones mathematicae},
     pages = {411--416},
     publisher = {mathdoc},
     volume = {64},
     year = {1981},
     zbl = {0485.57015},
     url = {http://geodesic.mathdoc.fr/item/IM_1981__64_142828/}
}