LI, Z.; JIANHUA, G.; WANG, Z.; WANG, Z. Exploration Potential of the Yanxi Formation in Middle Ordovician of Hunan Province. Journal of Mines, Metals and Fuels, [S. l.], v. 67, n. 5, p. 279–284, 2022. Disponível em: http://www.informaticsjournals.com/index.php/jmmf/article/view/31555. Acesso em: 10 may. 2024.