@Unpublished{K-theory/0620,
  author = 	 {{F. Andreatta and L. Barbieri Viale}},
  title = 	 {{Crystalline realizations of 1-motives}},
  note = 	 {{Preprint, February 11, 2003, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0620/}}}
}