Kaplan, S. M. and Goering, S. K. "Garp: a graphical/textual language for concurrent programming" pp184-186

[OOCP 1988] (1989) SIGPLAN Notices 24(04) April 1989 incoroporating Proceedings of the 1988 ACM SIGPLAN workshop on Object-based concurrent programming, San Diego  

Languages mentioned GARP {1988} Graph-based hybrid concurrent OO language