CHEN, Dongdong; ZHANG, Qianqian; LI , Chunpeng; LI, Yipeng. Research on the Common Determination Methods of Material Composition and Trace Elements in Pingdingshan Coal Mine Coal. International Journal of Energy, [S. l.], v. 6, n. 1, p. 30–34, 2025. DOI: 10.54097/2q6pw267. Disponível em: https://drpress.org/ojs/index.php/ije/article/view/29572. Acesso em: 17 apr. 2026.