Ariya Isihara. Hydra Games and Tree Ordinals. In Daniel Leivant, Ruy J. G. B. de Queiroz, editors, Logic, Language, Information and Computation, 14th International Workshop, WoLLIC 2007, Rio de Janeiro, Brazil, July 2-5, 2007, Proceedings. Volume 4576 of Lecture Notes in Computer Science, pages 238-247, Springer, 2007. [doi]
Abstract is missing.