HAMRLA, M. On the conditions of the origin of the coal beds in the Karst region. Geologija, [S. l.], v. 5, n. 1, p. 180–264, 1959. Disponível em: https://www.geologija-revija.si/index.php/geologija/article/view/201. Acesso em: 27 apr. 2024.