== See also ==* BETA, a modern successor to Simula== Notes ==== Sources ==* IBM System 360/370 Compiler and Historical Documentation The Simula Standard and other historical documentation by Peter Sylvester==Further reading==== External links ==* - with source code example* - with some notes on Demos by Graham Birtwistle* - based on the 1997 seminar "30 Years of Object Oriented Programming (OOP)"* - includes tutorials, documentation, and links in English and in French