LaLonde, W. R., D. A. Thomas, et al. (1986). "An exemplar based Smalltalk."

[OOPSLA 1986] (1986) SIGPLAN Notices 21(11) November 1986 (OOPSLA - Conference on Object Oriented Programming Systems Languages and Applications 1986)  

Languages mentioned Act1 {1982} Actor OO language Actra {1985} Multiprocessing Smalltalk