@Unpublished{K-theory/0320,
  author = 	 {{M. A. Mandell, J. P. May, S. Schwede, and B. Shipley}},
  title = 	 {{Model categories of diagram spectra}},
  note = 	 {{Preprint, December 8, 1998, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0320/}}}
}