1. Abiteboul, S., Hull, R., Vianu, V.: Foundations of Databases. Addison-Wesley (1995)
2. Abo Khamis, M., Ngo, H., Rudra, A.: FAQ: Questions asked frequently. In: Milo, T., Tan, W. (eds.) Proceedings 35th ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Databases, pp. 13–28, San Francisco (2016)
3. Abo Khamis, M., Ngo, H., Rudra, A.: Juggling functions inside a database. SIGMOD Record 46(1), 6–13 (2017)
4. Brijder, R., Geerts, F., Van den Bussche, J., Weerwag, T.: On the expressive power of query languages for matrices. In: Kimelfeld, B., Amsterdamer, Y. (eds.) Proceedings 21st International Conference on Database Theory, LIPIcs vol. 98, pp. 10:1–10:17, Vienna. Schloss Dagstuhl-Leibniz Center for Informatics (2018)
5. Brijder, R., Gyssens, M., Van den Bussche, J.: On matrices and K-relations. In: Herzig, A., Kontinen, J. (eds.) Proceedings 11th International Symposium on Foundations of Information and Knowledge Systems, Lecture Notes in Computer Science, vol. 12012, pp. 42–57. Dortmund, Springer (2020)