@Unpublished{K-theory/0869,
  author = 	 {{Joseph Gubeladze}},
  title = 	 {{Global coefficient ring in the nilpotence conjecture}},
  note = 	 {{Preprint, September 18, 2007, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0869/}}}
}