Kovács, György, and Patrick van Bommel. “Framework for Generating Object-Oriented Databases from Conceptual Specifications”. Acta Cybernetica 13, no. 2 (January 1, 1997): 103-140. Accessed November 22, 2024. https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3483.