@Unpublished{K-theory/0017,
  author = 	 {{Zdzislaw Wojtkowiak}},
  title = 	 {{Non-abelian unipotent periods Monodromy of iterated integrals}},
  note = 	 {{Preprint, June 15, 1994, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0017/}}}
}