A tetragonal natrolite. Bulletin Grønlands Geologiske Undersøgelse, Copenhagen, Denmark, v. 79, p. 1–21, 1969. DOI: 10.34194/bullggu.v79.6619. Disponível em: https://geusjournals.org/index.php/bullggu/article/view/6619. Acesso em: 7 jan. 2026.