Ada syntax diagrams for top-down analysis. - Rafael Bonet; Antonio Kung; Knut Ripken; Robert K. Yates; Manfred Sommer 001; Jürgen Winkler (ACM SIGPLAN Notices, 1981)

Structuring into subsystems: the experience of a prototyping approach. - Rafael Bonet; Antonio Kung (ACM SIGSOFT Softw. Eng. Notes, 1984)