(1)
van Zyl, P. G.; Beukes, J. P.; du Toit, G.; Mabaso, D.; Hendriks, J.; Vakkari, V.; Tiitta, P.; Pienaar, J. J.; Kulmala, M.; Laakso, L. Assessment of Atmospheric Trace Metals in the Western Bushveld Igneous Complex, South Africa. S. Afr. J. Sci. 2014, 110, 1-11.