Bibliography: Temporal Databases. - L. Edwin McKenzie (SIGMOD Rec., 1986)

Extending the Relational Algebra to Support Transaction Time. - L. Edwin McKenzie; Richard T. Snodgrass (SIGMOD Conference, 1987)

An Algebraic Language for Query and Update of Temporal Databases - L. Edwin McKenzie (1988)

Schema Evolution and the Relational Algebra. - L. Edwin McKenzie; Richard T. Snodgrass (Inf. Syst., 1990)

Evaluation of Relational Algebras Incorporating the Time Dimension in Databases. - L. Edwin McKenzie; Richard T. Snodgrass (ACM Comput. Surv., 1991)

Aggregates in the Temporal Query Language TQuel. - Richard T. Snodgrass; Santiago Gómez 001; L. Edwin McKenzie (IEEE Trans. Knowl. Data Eng., 1993)