THE LEVEL AND QUALITY OF TRADE SERVICES: THE ESSENCE AND RELATIONSHIP OF CONCEPTS. INNOVATIVE ECONOMY, [S. l.], n. 3-4, p. 118–123, 2021. DOI: 10.37332/2309-1533.2021.3-4.17. Disponível em: https://inneco.org/index.php/innecoen/article/view/803. Acesso em: 29 sep. 2025.