@article{IM_1976__33_142378,
     author = {Sylvain E. Cappell},
     title = {A {Splitting} {Theorem} for {Manifolds.}},
     journal = {Inventiones mathematicae},
     pages = {69--170},
     publisher = {mathdoc},
     volume = {33},
     year = {1976},
     zbl = {0348.57017},
     url = {http://geodesic.mathdoc.fr/item/IM_1976__33_142378/}
}