@Unpublished{K-theory/0728,
  author = 	 {{Jonathan Barker and Victor Snaith}},
  title = 	 {{psi^3 as an upper triangular matrix}},
  note = 	 {{Preprint, February 23, 2005, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0728/}}}
}