KOVÁCS, Kármen. Sustainability of advertising expenditures and its relations to market structure. REGIONAL AND BUSINESS STUDIES, [S. l.], v. 3, n. 1 Suppl., p. 409–419, 2011. Disponível em: https://journal.uni-mate.hu/index.php/rbs/article/view/497. Acesso em: 10 apr. 2025.