@article{CM_1994__91_1_67_0,
     author = {Morvan, Jean-Marie and Niglio, Louis},
     title = {Isotropic characteristic classes},
     journal = {Compositio Mathematica},
     pages = {67--89},
     publisher = {Kluwer Academic Publishers},
     volume = {91},
     number = {1},
     year = {1994},
     mrnumber = {1273927},
     zbl = {0836.57020},
     language = {en},
     url = {http://www.numdam.org/item/CM_1994__91_1_67_0/}
}