Steven Awodey. Natural Models of Homotopy Type Theory (Abstract). In Leonid Libkin, Ulrich Kohlenbach, Ruy J. G. B. de Queiroz, editors, Logic, Language, Information, and Computation - 20th International Workshop, WoLLIC 2013, Darmstadt, Germany, August 20-23, 2013. Proceedings. Volume 8071 of Lecture Notes in Computer Science, pages 11-12, Springer, 2013. [doi]