[1]
J. Villalobos Murillo, S. Brenes Chavarría, and S. Mora Rivera, “Computer-aided tool for the teaching of relational algebra in data base courses”, Uniciencia, vol. 26, no. 1-2, pp. 179–195, Jan. 2012, Accessed: Apr. 18, 2026. [Online]. Available: https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/3873