1. M.J. Gabbay, A Theory of Inductive Definitions with Alpha-equivalence, Ph.D. thesis, Cambridge, UK (2000).
2. A new approach to abstract syntax with variable binding;Gabbay;Formal Aspects of Computing,2001
3. A Course in Mathematical Logic;Bell,1977
4. Notes on Logic and Set Theory;Johnstone,1987
5. On a monadic semantics for freshness;Shinwell;Theoretical Computer Science,2005