1. Simon Ambler and Roy L. Crole. 1999. Mechanized Operational Semantics via (Co)Induction. In TPHOLs’99 (Lecture Notes in Computer Science), Yves Bertot, Gilles Dowek, André Hirschowitz, Christine Paulin-Mohring, and Laurent Théry (Eds.), Vol. 1690. Springer, Nice, France, 221–238.
2. Abhishek Anand and Vincent Rahli. 2014. Towards a Formally Verified Proof Assistant. In ITP 2014 (Lecture Notes in Computer Science), Gerwin Klein and Ruben Gamboa (Eds.), Vol. 8558. Springer, Vienna, Austria, 27–44.
3. David Baelde, Kaustuv Chaudhuri, Andrew Gacek, Dale Miller, Gopalan Nadathur, Alwen Tiu, and Yuting Wang. 2014. Abella: A System for Reasoning about Relational Specifications. J. Formalized Reasoning 7, 2 (2014), 1–89.
4. Richard S. Bird and Ross Paterson. 1999. De Bruijn Notation as a Nested Datatype. J. Funct. Program. 9, 1 (1999), 77–91.
5. Arthur Charguéraud. 2012. The Locally Nameless Representation. Journal of Automated Reasoning 49, 3 (2012), 363–408.