@article{10_4171_dm_30,
     author = {Victor Nistor},
     title = {Higher index theorems and the boundary map in cyclic cohomology},
     journal = {Documenta mathematica},
     pages = {263--295},
     year = {1997},
     volume = {2},
     doi = {10.4171/dm/30},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/30/}
}