Hollingdale, S.M. (ed.) "Digital Simulation in Operations Research", English Universities Press, London, 1965

• Dahl, Ole-johan, and Kristen Nygaard, (1965) Dahl, Ole-johan, and Kristen Nygaard, "Basic concepts of SIMULA, an ALGOL based simulation language" pp116-124
• Hills, P.R. (1965) Hills, P.R. "SIMON - a Simulation language in ALGOL"