HOELSTAD, T.; PIASECKI, S.; STEMMERIK, L. Shape and size of lacustrine deposited melanogen (opaque organic matter), Upper Carboniferous, East Greenland. Rapport Grønlands Geologiske Undersøgelse, Copenhagen, Denmark, v. 164, p. 19–28, 1994. DOI: 10.34194/rapggu.v164.8267. Disponível em: https://geusjournals.org/index.php/rapggu/article/view/8267. Acesso em: 18 may. 2024.