1. Ungar, D., Smith, R.: Self: The Power of Simplicity. In: Proceedings of OOPSLA, vol. 22. ACM Press, New York (1987)
2. De Meuter, W.: Agora: The Scheme of Object-Orientation, or, the Simplest MOP in the World. In: Noble, J., Taivalsaari, A., Moore, I. (eds.) Prototype-based Programming: Concepts, Languages and Applications (1998)
3. Taivalsaari, A.: Classes vs. Prototypes: Some Philosophical and Historical Observations. In: Noble, J., Taivalsaari, A., Moore, I. (eds.) Prototype-based Programming: Concepts, Languages and Applications (1998)
4. Smith, W.: NewtonScript: Prototypes on the Palm. In: Noble, J., Taivalsaari, A., Moore, I. (eds.) Prototype-based Programming: Concepts, Languages and Applications (1998)
5. Lecture Notes in Artificial Intelligence;W. Belle Van,2001