1. The entity-relationship model—toward a unified view of data;Chen;ACM Trans Database Syst,1976
2. A relational model of data for large shared data banks;Codd;Commun ACM,1970
3. An approach to developing complex database schemas using form types;Luković;Softw: Pract Exp,2007
4. Wazlawick RS. Object-oriented analysis and design for information systems. United States of America. Elsevier science, Morgan Kaufmann; 2014. 〈https://books.google.rs/books/about/Object_Oriented_Analysis_and_Design_for.html?id=fCRCAgAAQBAJ&hl=en〉
5. Meta-object facility. URL 〈http://www.omg.org/mof/〉.