Healfdene Goguen. A syntactic approach to eta equality in type theory. In Jens Palsberg, MartÃn Abadi, editors, Proceedings of the 32nd ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages, POPL 2005, Long Beach, California, USA, January 12-14, 2005. pages 75-84, ACM, 2005. [doi]
Abstract is missing.