Once grand, now forgotten: what do we know about the superhigh-organic-sulphur Raša coal?. Rudarsko-geološko-naftni zbornik, [S. l.], v. 31, n. 3, p. 27–45, 2016. DOI: 10.17794/rgn.2016.3.3. Disponível em: https://ojs.srce.hr/index.php/rgn/article/view/3942. Acesso em: 24 aug. 2025.