AZALOV, P.; ZLATAROVA, F. An intelligent object-oriented data model. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 83, n. 1, p. 113–121, 1992. Disponível em: https://stipendii.uni-sofia.bg/index.php/fmi/article/view/491. Acesso em: 5 dec. 2024.