Assmann, K.; Venema, R. and Hoehne, K. H. "The ISQL-Language, A software Tool for Development of Pictorial Information Systems," in Visual Languages, S. K. Chang, T. Ichikawa and P. A. Ligomenides Eds. New York:Plenum, pp. 261-284, 1986.

Languages mentioned

• ISQL {1983}