NIELSEN, Eigil. On some trails from Triassic beds of East Greenland. Meddelelser om Grønland, [S. l.], v. 149, n. 4, p. 1–944, 1949. Disponível em: https://tidsskrift.dk/meddrgroenland/article/view/164976. Acesso em: 8 feb. 2026.