Кахута, Надежда Дмитриевна. “Mathematical Foundations of Relational Databases. Part 1: Presentation of the Main Table Operations”. Bulletin of V.N. Karazin Kharkiv National University, series «Mathematical modeling. Information technology. Automated control systems» 24, no. 1105 (April 28, 2014): 75-84. Accessed December 22, 2024. https://periodicals.karazin.ua/mia/article/view/14251.