[1]. Christine Paulin-Mohring. Introduction to the Calculus of Inductive Constructions.
[2]. A. Asperti, W. Ricciotti, C. Sacerdoti Coen, E. Tassi. A compact kernel for the calculus of inductive constructions.
[3]. Frank Pfenning, Christine Paulin-Mohring. Inductively Defined Types in the Calculus of Construction