Vijay A. Saraswat, "Actors as a special case of concurrent constraint (logic) programming", in SIGPLAN Notices, October 1990. Describes Janus. Carl Hewitt
Oxygene(英语:Oxygene (programming language)) Concurrent Pascal(英语:Concurrent Pascal) Pascal与C语言的比较(英语:Comparison of Pascal and C) C语言 Real Programmers Don't