A semantic model for a language processor. - Robert V. Zara (ACM National Conference, 1967)

Building a layered database for design automation. - Robert V. Zara; David R. Henke (DAC, 1985)

An abstract machine data structure for non-procedural functional models. - Robert V. Zara; Kevin Rose; Ghulam Nurie; Harish Sarin (DAC, 1985)