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1. Minimum Fill-in of Sparse Graphs: Kernelization and Approximation
   Fedor V. Fomin, Geevarghese Philip, and Yngve Villanger
   In: IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science, FSTTCS 2011, December 12-14, 2011, Mumbai, India, Mumbai, India, 2011, 164-175
   [PDF: Download: fillin.pdf]