1. Two-level type theory and applications
2. Ana Bove, Peter Dybjer, and Ulf Norell. 2009. A brief overview of Agda---a functional language with dependent types. In Theorem Proving in Higher Order Logics. Springer, 73--78.
3. Martín Hötzel Escardó. 2019. Introduction to Univalent Foundations of Mathematics with Agda. Lecture notes from Midlands Graduate School. https://www.cs.bham.ac.uk/~mhe/HoTT-UF-in-Agda-Lecture-Notes/HoTT-UF-Agda.html#149931
4. Formal objects in type theory using very dependent types;Hickey Jason J;Foundations of Object Oriented Languages,1996
5. The homotopy theory of type theories