@Unpublished{K-theory/0931,
  author = 	 {{Ivan Panin , Victor Petrov , and Anastasia Stavrova }},
  title = 	 {{Grothendieck-Serre's conjecture for adjoint groups of types E_6 and E_7 }},
  note = 	 {{Preprint, May 10, 2009, K-theory Preprint Archives, http://www.math.uiuc.edu/K-theory/0931/}}}
}