Matthias Baaz, Christian G. Fermüller. A Note on the Proof-Theoretic Strength of a Single Application of the Schema of Identity. In Reinhard Kahle, Peter Schroeder-Heister, Robert F. Stärk, editors, Proof Theory in Computer Science, International Seminar, PTCS 2001, Dagstuhl Castle, Germany, October 7-12, 2001, Proceedings. Volume 2183 of Lecture Notes in Computer Science, pages 38-48, Springer, 2001. [doi]
Abstract is missing.