KIPPHARDT, Heinrich; MATSCHAT, Ralf; PANNE, Ulrich. Development of SI Traceable Standards for Element Determination. CHIMIA, [S. l.], v. 63, n. 10, p. 637, 2009. DOI: 10.2533/chimia.2009.637. Disponível em: https://www.chimia.ch/chimia/article/view/2009_637. Acesso em: 19 jun. 2024.