Innovative Price Adjustments Technique for Thermal Coal: A Study of Operation Function under Changing Techno Environment. Global Journal of Management and Business Research, [S. l.], v. 13, n. 7, p. 9–12, 2013. Disponível em: https://journalofbusiness.org/index.php/GJMBR/article/view/. Acesso em: 18 oct. 2026.