The Design of a General-purpose Command Interpreter for Graphical Man-machine Communication to Be Built on Top of a GKS. - H. G. Borufka; Günther E. Pfaff (Eurographics, 1980)

Normungsarbeiten im Anschluß an GKS. - H. G. Borufka; Herbert W. Kuhlmann; Jürgen Schönhut (Inform. Spektrum, 1983)