[ACM] Proceedings of 17th ACM Annual Computer Science Conference : Computing trends in the 1990's Louisville, Kentucky, United States 1989

• Cheng, W.-H. S. and V. E. Wallentine (1989) Cheng, W.-H. S. and V. E. Wallentine "DEBL: a knowledge-based language for specifying and debugging programs" pp70-77
• King, K. N. (1989) King, K. N. "The international standardization of Modula-2" pp313-319