POULSEN, C. Om Dictyograptusskiferen paa Bornholm. Danmarks Geologiske Undersøgelse IV. Række, [S. l.], v. 1, n. 16, p. 1–28, 1922. DOI: 10.34194/raekke4.v1.6966. Disponível em: https://geusjournals.org/index.php/raekke4/article/view/6966. Acesso em: 3 jul. 2024.