1. Reference deleted in proofs.
2. Aczel, P. 1978, A general Church–Rosser theorem, preprint, University of Manchester.
3. On Mints' reduction for ccc-calculus;Akama,1993
4. A call-by-need lambda calculus;Ariola,1995
5. The Lambda Calculus, Its Syntax and Semantics;Barendregt,1984