Formal systems and analysis of context sensitive languages. - Ziad J. Ghandour (Comput. J., 1972)

General Arrays, Operators and Functions. - Ziad J. Ghandour; Jorge E. Mezei (IBM J. Res. Dev., 1973)

A simple approach to the empty generalized APL arrays. - Ziad J. Ghandour (APL, 1976)