SLACK, J. F.; BECK, F. M. .; BRADLEY, D. C.; FELCH, M. M.; MARVINNEY, R. G.; WHITTAKER, A. T. Potential for critical mineral deposits in Maine, USA. Atlantic Geoscience, [S. l.], v. 58, p. 155–191, 2022. DOI: 10.4138/atlgeo.2022.007. Disponível em: https://journals.lib.unb.ca/index.php/ag/article/view/32804. Acesso em: 27 jan. 2023.