Thomas, D. A. et al. "Actra - a multitasking/multiprocessing Smalltalk."

[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 Actra {1985} Multiprocessing Smalltalk