1. The Automath Archive. Hosted at Eindhoven University of Technology: http://www.win.tue.nl/automath/.
2. Lambda calculi with types;Barendregt,1992
3. Proof-assistants using dependent type systems;Barendregt,2001
4. Lambda calculus with types,2013
5. L.S. van Benthem Jutting, Checking Landau’s “Grundlagen” in the Automath system, Ph.D. Thesis, Technische Hogeschool Eindhoven, 1977.