An Implementer's View of PHIGS. - Salim S. Abi-Ezzi; Albert J. Bunshaft (IEEE Computer Graphics and Applications, 1986)

Extending graphics standards to meet industry requirements. - Albert J. Bunshaft; Richard Puk; Gregory D. Laib; Salim S. Abi-Ezzi (SIGGRAPH (Panels), 1988)