1. 1975. Interim Report: ANSI/X3/SPARC Study Group on Data Base Management Systems. FDT - Bulletin of ACM SIGMOD 7, 2 ( 1975 ). 1975. Interim Report: ANSI/X3/SPARC Study Group on Data Base Management Systems. FDT - Bulletin of ACM SIGMOD 7, 2 (1975).
2. Serge Abiteboul , Richard Hull , and Victor Vianu . 1995. Foundations of Databases . Addison-Wesley . Serge Abiteboul, Richard Hull, and Victor Vianu. 1995. Foundations of Databases. Addison-Wesley.
3. On the representation and querying of sets of possible worlds
4. Marcelo Arenas , Pablo Barceló , Leonid Libkin , Wim Martens , and Andreas Pieris . 2022 . Database Theory: Querying Data. Freely available from github.com/pdm-book/community. Marcelo Arenas, Pablo Barceló, Leonid Libkin, Wim Martens, and Andreas Pieris. 2022. Database Theory: Querying Data. Freely available from github.com/pdm-book/community.
5. Marcelo Arenas , Pablo Barceló , Leonid Libkin , and Filip Murlak . 2014. Foundations of Data Exchange . Cambridge University Press . Marcelo Arenas, Pablo Barceló, Leonid Libkin, and Filip Murlak. 2014. Foundations of Data Exchange. Cambridge University Press.