HALKIN, J. L’information documentaire, problème de gestion. JORBEL - Belgian Journal of Operations Research, Statistics, and Computer Science, [S. l.], v. 4, n. 2, p. 16–19, 1963. Disponível em: https://www.orbel.be/jorbel/index.php/jorbel/article/view/33. Acesso em: 29 mar. 2024.