BJERRESKOV, M. Ordovician graptolite biostratigraphy in North Greenland. Rapport Grønlands Geologiske Undersøgelse, Copenhagen, Denmark, v. 144, p. 17–33, 1989. DOI: 10.34194/rapggu.v144.8059. Disponível em: https://geusjournals.org/index.php/rapggu/article/view/8059. Acesso em: 27 nov. 2024.