Hoelstad, T, S Piasecki, and L Stemmerik. “Shape and Size of Lacustrine Deposited Melanogen (opaque Organic matter), Upper Carboniferous, East Greenland”. Rapport Grønlands Geologiske Undersøgelse 164 (January 1, 1994): 19–28. Accessed November 27, 2024. https://geusjournals.org/index.php/rapggu/article/view/8267.