@Unpublished{K-theory/0616,
  author = 	 {{Baptiste Calmes}},
  title = 	 {{Le groupe SK_2 d'une algebre de biquaternions}},
  note = 	 {{Preprint, January 17, 2003, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0616/}}}
}