@Unpublished{K-theory/0848,
  author = 	 {{Alexander Nenashev}},
  title = 	 {{Projective push-forwards in the Witt theory of algebraic varieties}},
  note = 	 {{Preprint, May 31, 2007, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0848/}}}
}