Bracha, Gibblad and Griswold, David "Strongtalk: Typechecking Smalltalk in a Production Environment" pp215-230

[OOPSLA 1993] (1993) [ACM SIGPLAN] SIGPLAN Notices 28(10) October 1993 Proceedings of the Conference on Object Oriented Programming Systems, Languages and Applications, Sept-Oct 1993. (OOPSLA '93)  

Languages mentioned Strongtalk {1997}