THOMASSEN, B.; TUKIAINEN, T.; SECHER, K. Detailed investigation of the niobium-tantalum distribution within the Motzfeldt Centre, South Greenland. Rapport Grønlands Geologiske Undersøgelse, Copenhagen, Denmark, v. 140, p. 66–70, 1988. DOI: 10.34194/rapggu.v140.8038. Disponível em: https://geusjournals.org/index.php/rapggu/article/view/8038. Acesso em: 3 jul. 2024.