European Conference on Object-Oriented Programming, Oslo, Norway, Nygaard, K., & Gjessing, S. (1988). ECOOP '88, European Conference on Object-Oriented Programming, Oslo, Norway, August 15-17, 1988, proceedings. Springer-Verlag.

European Conference on Object-Oriented Programming, Oslo, Norway, Kristen Nygaard, and S. Gjessing. ECOOP '88, European Conference on Object-Oriented Programming, Oslo, Norway, August 15-17, 1988, Proceedings. Berlin ; New York: Springer-Verlag, 1988.

European Conference on Object-Oriented Programming, Oslo, Norway, et al. ECOOP '88, European Conference on Object-Oriented Programming, Oslo, Norway, August 15-17, 1988, Proceedings. Springer-Verlag, 1988.