Merrett, T. H. "Experience with the domain algebra" in Proc. 3rd Int. Conf. Data and Knowledge Bases Improving Usability and Responsiveness. C. Beeri, U. Dayal. and J. Schmidt, Eds. San Mateo, CA: Morgan Kaufmann, July 1988, pp. 335-346.

Languages mentioned

• Aldat {1989} Database language, based on extended algebra
• Relix {1984} Implementation of first stage of Aldat