@article{IM_1983__73_143047,
     author = {J.L. Heitsch},
     title = {Flat {Bundles} and {Residues} for {Foliations.}},
     journal = {Inventiones mathematicae},
     pages = {271--286},
     publisher = {mathdoc},
     volume = {73},
     year = {1983},
     zbl = {0523.57017},
     url = {http://geodesic.mathdoc.fr/item/IM_1983__73_143047/}
}