Pedersen, K.R, and J Lam. “Precambrian Organic Compounds from the Ketilidian of South-West Greenland. Part III”. Bulletin Grønlands Geologiske Undersøgelse 82 (January 20, 1970): 1–42. Accessed July 3, 2024. https://geusjournals.org/index.php/bullggu/article/view/6622.