@Unpublished{K-theory/0903,
  author = 	 {{Paul Balmer and Baptiste Calmes}},
  title = 	 {{Witt groups of Grassmann varieties}},
  note = 	 {{Preprint, July 27, 2008, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0903/}}}
}