@Unpublished{K-theory/0824,
  author = 	 {{Guillermo Cortiñas, Christian Haesemeyer, and Charles Weibel}},
  title = 	 {{Infinitesimal cohomology and the Chern character to negative cyclic homology}},
  note = 	 {{Preprint, March 6, 2007, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0824/}}}
}