@article{IM_1969__9_142007,
     author = {B. MAZUR and L. ROBERTS},
     title = {Local {Euler} {Characteristics.}},
     journal = {Inventiones mathematicae},
     pages = {201--234},
     publisher = {mathdoc},
     volume = {9},
     year = {1969},
     url = {http://geodesic.mathdoc.fr/item/IM_1969__9_142007/}
}