1. Ammann, U., Wirth, N.: Advantages of the value parameter over the constant parameter. Unpublished memo, Eidgenössische Technische Hochschule, Zürich, 1972
2. Birtwistle, G.M., Dahl, O.J., Myrhaug, B., Nygaard, K.: SIMULA BEGIN. Philadelphia: Auerbach 1973. Also Lund: Studentlitteratur 1974
3. Brinch Hansen, P.: Universal types in Concurrent Pascal. Information Processing Letters 3, 165?166 (1975)
4. Bron, C., de Vries, W.: A Pascal compiler for PDP-11 mini-computers. Software Practice and Experience 6, 109?116 (1976)
5. Church, A.: The calculi of lambda conversion. Princeton: Princeton University Press 1941