Improving the quality of silica sand as a proppant for hydraulic fracking industry purposes. Rudarsko-geološko-naftni zbornik, [S. l.], v. 40, n. 1, p. 145–163, 2025. DOI: 10.17794/rgn.2025.1.11. Disponível em: https://ojs.srce.hr/index.php/rgn/article/view/32094. Acesso em: 19 aug. 2025.