Pedersen, A., Larsen, L. and Ulff-Møller, F. (1989) “Discovery of andesite tuffs with graphite from the Vaigat Formation of south central Nûgssuaq: stratigraphical implications”, Rapport Grønlands Geologiske Undersøgelse. Copenhagen, Denmark, 145, pp. 42–45. doi: 10.34194/rapggu.v145.8071.