Erich Grädel, Martin Grohe. Is Polynomial Time Choiceless?. In Lev D. Beklemishev, Andreas Blass, Nachum Dershowitz, Bernd Finkbeiner, Wolfram Schulte, editors, Fields of Logic and Computation II - Essays Dedicated to Yuri Gurevich on the Occasion of His 75th Birthday. Volume 9300 of Lecture Notes in Computer Science, pages 193-209, Springer, 2015. [doi]
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