HAMRLA, M. A contribution to the geology of the senonian region of the Grdelička klisura (Grdelica gorge) in southern Serbia. Geologija, [S. l.], v. 1, n. 1, p. 243–261, 1953. Disponível em: https://www.geologija-revija.si/index.php/geologija/article/view/137. Acesso em: 4 may. 2024.