OPERATING COST ANALYSIS: SOURCES AND METHODS. INNOVATIVE ECONOMY, [S. l.], n. 7-8, p. 132–138, 2020. DOI: 10.37332/2309-1533.2019.7-8.19. Disponível em: https://inneco.org/index.php/innecoen/article/view/217. Acesso em: 29 sep. 2025.