H. Masuhara, S. Matsuoka, T. Watanabe, and A. Yonezawa. "Object-oriented concurrent reflective languages can be implemented efficiently" pp127-145

[OOPSLA 1992] (1992) [SIGPLAN] Proceedings of the Conference on Object Oriented Programming Systems, Languages and Applications, Oct 1992. (OOPSLA '92)  

Languages mentioned ABCL/R2 {1992} reflective concurrent object-oriented language