VERMA , S. P. Improved concentration data in two international geochemical reference materials (USGS basalt BIR-1 and GSJ peridotite JP-1) by outlier rejection . Geofísica Internacional, [S. l.], v. 37, n. 3, p. 215–250, 1998. DOI: 10.22201/igeof.00167169p.1998.37.3.394. Disponível em: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/612. Acesso em: 3 may. 2024.