JESSEN, A. Vendsyssels Geologi. Danmarks Geologiske Undersøgelse V. Række, [S. l.], v. 2, p. 1–195, 1936. DOI: 10.34194/raekke5.v2.7010. Disponível em: https://geusjournals.org/index.php/raekke5/article/view/7010. Acesso em: 14 may. 2024.