C. Reedy

Reference Model for DBMS Standardization, Database Architecture Framework Task Group (DAFTG) of the ANSI/X3/SPARC Database System Study Group

Nick Roussopoulos, Elizabeth N. Fong, Walter F. Truszkowski, 1986, SIGMOD Rec..

Reference model for DBMS standardization

Elizabeth N. Fong, Walter F. Truszkowski, D Jefferson, 1986, SGMD.