G. Chari, D. Garbervetsky, and S. Marr. Proceedings of the 11th Workshop on Implementation, Compilation, Optimization of Object-Oriented Languages, Programs and Systems, page 5. (Jun 19, 2017)
H. Masuhara, S. Matsuoka, K. Asai, and A. Yonezawa. Proceedings of the Tenth Annual Conference on Object-oriented Programming Systems, Languages, and Applications, page 300--315. New York, NY, USA, ACM, (1995)