@article{10_1090_S0894_0347_1991_1102578_4,
     author = {Cappell, Sylvain E. and Shaneson, Julius L.},
     title = {Stratifiable maps and topological invariants},
     journal = {Journal of the American Mathematical Society},
     pages = {521--551},
     publisher = {mathdoc},
     volume = {04},
     number = {3},
     year = {1991},
     doi = {10.1090/S0894-0347-1991-1102578-4},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1991-1102578-4/}
}