KRESTEN NIELSEN, J. .; HANKEN, N.-M. . Late Permian carbonate concretions in the marine siliciclastic sediments of the Ravnefjeld Formation, East Greenland. Geology of Greenland Survey Bulletin, [S. l.], v. 191, p. 126–132, 2002. DOI: 10.34194/ggub.v191.5140. Disponível em: https://geusjournals.org/index.php/ggub/article/view/6434. Acesso em: 26 apr. 2024.