Precambrian organic compounds from the Ketilidian of South-West Greenland. Parts I and II. Bulletin Grønlands Geologiske Undersøgelse, Copenhagen, Denmark, v. 74, p. 1–15, 1968. DOI: 10.34194/bullggu.v74.6612. Disponível em: https://geusjournals.org/index.php/bullggu/article/view/6612. Acesso em: 9 jan. 2026.