@article{10_4171_dm_120,
     author = {Shoji Yokura},
     title = {On the uniqueness problem of bivariant {Chern} classes},
     journal = {Documenta mathematica},
     pages = {133--142},
     year = {2002},
     volume = {7},
     doi = {10.4171/dm/120},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/120/}
}