@article{10_4171_dm_26,
     author = {Joachim Cuntz},
     title = {Bivariant $K$-theory for locally convex algebras and the {Chern-Connes} character},
     journal = {Documenta mathematica},
     pages = {139--182},
     year = {1997},
     volume = {2},
     doi = {10.4171/dm/26},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/26/}
}