Dong, Y.-L. et al. 2013. Application of Graphene as a Sorbent for Preconcentration and Determination of Trace Amounts of Lead in Water Samples Prior to Flame Atomic Absorption Spectrometry. Asian Journal of Chemistry. 25, 11 (Jun. 2013), 6267–6269. DOI:https://doi.org/10.14233/ajchem.2013.14350.