@article{IM_1974__27_142312,
     author = {Kenneth S. Brown},
     title = {Euler {Characteristics} of {Discrete} {Groups} and {G-Spaces.}},
     journal = {Inventiones mathematicae},
     pages = {229--264},
     publisher = {mathdoc},
     volume = {27},
     year = {1974},
     zbl = {0294.20047},
     url = {http://geodesic.mathdoc.fr/item/IM_1974__27_142312/}
}