@Unpublished{K-theory/0900,
  author = 	 {{Christian Haesemeyer and Charles A. Weibel}},
  title = 	 {{Norm Varieties and the Chain Lemma (after Markus Rost)}},
  note = 	 {{Preprint, June 22, 2008, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0900/}}}
}