1. Logic Programming Series;H. Aït-Kaci,1991
2. Per Brand. A decision graph algorithm for CCP languages. In Leon Sterling, editor, Proceedings of the 1995 International Conference on Logic Programming, pages 433–448, Kanagawa, Japan, June 1995. The MIT Press.
3. William Clinger and Jonathan Rees. The Revised4 Report on the Algorithmic Language Scheme. LISP Pointers, IV(3):1–55, July–September 1991.
4. Alain Colmerauer. Prolog and infinite trees. In K.L. Clark and S.-A. Tärnlund, editors, Logic Programming, pages 153–172. Academic Press, 1982.
5. Alain Colmerauer. Equations and inequations on finite and infinite trees. In Proceedings of the 2nd International Conference on Fifth Generation Computer Systems, pages 85–99, 1984.