@article{MM2_1973__11_154200,
     author = {Ph. Tondeur and Franz W. Kamber},
     title = {Characteristic {Invariants} of {Foliated} {Bundles.}},
     journal = {Manuscripta mathematica},
     pages = {51--90},
     publisher = {mathdoc},
     volume = {11},
     year = {1973},
     zbl = {0267.57012},
     url = {http://geodesic.mathdoc.fr/item/MM2_1973__11_154200/}
}