@Unpublished{K-theory/0065,
  author = 	 {{Luca Barbieri-Viale, Claudio Pedrini, and Charles Weibel}},
  title = 	 {{Roitman's theorem for singular complex projective surfaces}},
  note = 	 {{Preprint, March 29, 1995, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0065/}}}
}