BERRY, W.; BOUCOT, A.; DAWES, P.; PEEL, J. Late Silurian and early Devonian graptolites from North Greenland. Rapport Grønlands Geologiske Undersøgelse, Copenhagen, Denmark, v. 65, p. 11–13, 1974. DOI: 10.34194/rapggu.v65.7376. Disponível em: https://geusjournals.org/index.php/rapggu/article/view/7376. Acesso em: 3 jul. 2024.