E.F. Codd and C.J. Date. "Interactive Support for Nonprogrammers: The Relational and Network Approaches." IBM Research Report RJ1400 (June 6th, 1974). Republished in Randall J. Rustin (ed.), Proc. ACM SIGMOD Workshop on Data Description, Access, and Control, Vol. II, Ann Arbor, Michigan (May 1974). Also in C.J. Date, Relational Database: Selected Writings, Reading, Mass.: Addison-Wesley (1986).
Date, C.J. and E.F. Codd. "The Relational and Network Approaches: Comparison of the Application Programming Interfaces." IBM Research Report RJ1401 (June 6th, 1974). Republished in Randall J. Rustin (ed.), Proc. ACM SIGMOD Workshop on Data Description, Access, and Control, Vol. II, Ann Arbor, Michigan (May 1974). Also in C.J. Date, Relational Database: Selected Writings. Reading, Mass.: Addison-Wesley (1986).
Date, C.J. "Support for the Conceptual Schema: The Relational and Network Approaches." In C.J. Date, Relational Database Writings 1985-1989. Reading, Mass.: Addison-Wesley (1990).
Codd, E.F. "Normalized Data Base Structure: A Brief Tutorial." Proc. 1971 ACM SIGFIDET Workshop on Data Description, Access, and Control, San Diego, Calif. (November 11th-12th, 1971).
Date, C.J. "Don't Mix Pointers and Relations!" and "Don't Mix Pointers and Relations - Please!". In C.J.Date, Hugh Darwen, and David McGoveran: Relational Database Writings 1994-1997. Reading, Mass.: Addison-Wesley, 1998.
Date, C.J. and Hugh Darwen. Foundation for Object/Relational Databases: The Third Manifesto. Reading, Mass.: Addison-Wesley, 1998.
Codd, E.F. "Extending the Relational Database Model to Capture More Meaning." IBM Research Report RJ2599 (August 6th, 1979). Republished in ACM Transactions on Database Systems 4(4), December 1979.
Codd, E.F. The Relational Model for Database Management Version 2. Reading, Mass.: Addison-Wesley, 1990.
Pin-Shan Chen. :The Entity-Relationship Model - Toward a Unified View of Data". ACM Transactions on Database Systems 1(1), March 1976. Republished in Michhael Stonebraker (ed.): Readings in Database Systems (2nd edition), San Mateo, Calif.: Morgan Kaufmann, 1994.
Date, C.J. "The Extended Relational Model RM/T." In C.J.Date, Relational Database Writings 1991-1994. Reading, Mass.: Addison-Wesley, 1995.
Date, C.J. and Hugh Darwen. A Guide to the SQL Standard (4th edition). Reading, Mass.: Addison-Wesley, 1997.
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Codd, E.F. "A Data Sublanguage Founded on the Relational Calculus." IBM Research Report RJ893 (July 26th, 1971). Republished in Proc. 1971 ACM SIGFIDET Workshop on Data Description, Access and Control, San Diego, November 1971.
Codd, E.F. "Interactive Support for Nonprogrammers: The Relational and Network Approaches." IBM Research Report RJ1400 (June 6th, 1974). Republished in Randall J. Rustin (ed.), Proc. ACM SIGMOD Workshop on Data Description, Access, and Control, Vol. II, Ann Arbor, Michigan, May 1974. Also in C.J. Date, Relational Database: Selected Writings. Reading, Mass.: Addison-Wesley, 1986.
Codd, E.F. "Recent Investigations into Relational Data Base Systems". IBM Research Report RJ1385 (April 13rd, 1974). Republished in Proc. 1974 Congress (Stockholm, 1974). New York, N.Y.: North-Holland, 1974.
Codd, E.F. "Relational Database: A Practical Foundation for Productivity." IBM Research Report RJ3339 (December 21st, 1981. Republished in CACM 25(2), February 1982.
Codd, E.F. "Data Models in Database Management. Proc. Workshop in Data Abstraction, Databases, and Conceptual Modelling (Michael L. Brodie and Stephen N. Zilles, eds.), Pingree Park, Colo. (June 1980): ACM SIGART Newsletter No. 74 (January 1981); ACM SIGMOD Record 11(2), February 1981; ACM SIGPLAN Notices 16(1), January 1981.
Stonebraker, Michael. Introduction to Chapter 1 ("The Roots"). Readings in Database Systems (2nd edition). San Mateo, Calif.: Morgan Kaufmann, 1994.
Codd, E.F. "A Relational Model of Data for Large Shared Data Banks." CACM 13(6), June 1970. Republished in Milestones of Research -- Selected Papers 1958-1982 (CACM 25th Anniversary Issue), CACM 26(1), January 1983.
Codd, E.F. "Is Your DBMS Really Relational?"; "Does Your DBMS Run By The Rules?" Computerworld (October 14th, 1985; October 21st, 1985).
Codd, E.F. The Relational Model For Database Management Version 2. Reading, Mass.: Addison-Wesley, 1990.
Date, C.J. and Hugh Darwen. Foundation for Object/Relational Databases: The Third Manifesto. Reading, Mass.: Addison-Wesley, 1998.
E.F. Codd: "Derivability, Redundancy, and Consistency of Relations Stored in Large Data Banks." IBM Research Report RJ599 (August 19th, 1969).
E.F. Codd: "A Relational Model of Data for Large Shared Data Banks." CACM 13, No. 6 (June 1970). Republished in Milestones of Research - Selected Papers 1958-1982 (CACM 25th Anniversary Issue), CACM 26, No. 1 (January 1983).
E.F. Codd: "Relational Completeness of Data Base Sublanguages" (presented at Courant Computer Science Symposia Series 6, "Data Base Systems", New York City, N.Y., May 24th-25th, 1971). IBM Research Report RJ987 (March 6th, 1972). Republished in Randal J. Rustin (ed.), Data Base Systems: Courant Computer Science Symposia Series 6, Englewood Cliffs, N.Y.: Prentice-Hall (1972).
C.J. Date: "An Introduction to Database Systems (6th edition). Reading, Mass.: Addison-Wesley (1995).
C.J. Date: "Tables with No Columns". Database Programming & Design 6, No. 3 (March 1993). Republished in Relational Database Writings 1991-1994, Reading, Mass.: Addison-Wesley (1995).
