1. Sigplan Notices;M. Alpuente,1997
2. Alpuente, M., Falaschi, M., Moreno, G., Vidal, G.: Rules + Strategies for Transforming Lazy Functional Logic Programs. Theoretical Computer Science 311(1-3), 479–525 (2004)
3. Baldwin, J.F., Martin, T.P., Pilsworth, B.W.: Fril- Fuzzy and Evidential Reasoning in Artificial Intelligence. John Wiley & Sons, Inc., Chichester (1995)
4. Burstall, R., Darlington, J.: A Transformation System for Developing Recursive Programs. Journal of the ACM 24(1), 44–67 (1977)
5. Damásio, C., Medina, J., Ojeda-Aciego, M.: A tabulation proof procedure for residuated logic programming. In: Proc. of the European Conference on Artificial Intelligence. Frontiers in Artificial Intelligence and Applications, vol. 110, pp. 808–812 (2004)