Bruno Grenet, Pascal Koiran, Natacha Portier, Yann Strozecki. The Limited Power of Powering: Polynomial Identity Testing and a Depth-four Lower Bound for the Permanent.
IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS'11), Indian Association for Research in Computing Science, Dec 2011, Mumbai, India. pp.16,
⟨10.4230/LIPIcs.FSTTCS.2011.127⟩.
⟨ensl-00607154⟩