Proceedings of the 1992 IEEE Workshop on visual languages. September 15-18, 1992, held at Seattle, Washington, USA. - Institute of electrical and electronics engineers, 1992.
Proceedings of the 1989 IEEE Workshop on visual languages. October 4-6, 1989, Rome, Italy. - Institute of electrical and electronics engineers, 1989.
Proceedings of the 1988 IEEE Workshop on visual languages. October 10-12, 1988, Pittsburgh, Pennsylvania, USA. - Institute of electrical and electronics engineers, 1988.