@Unpublished{K-theory/0285,
  author = 	 {{Jonathan Rosenberg}},
  title = 	 {{The K-homology class of the Euler characteristic operator is trivial}},
  note = 	 {{Preprint, June 12, 1998, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0285/}}}
}