@article{pohl_stecka_greda_jamroz_2012,  title={Determination of the hydrophobic fraction of Ca, Fe, Mg and Zn in dark color honeys using solid phase extraction and flame atomic absorption spectrometry},  volume={23},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532012000600014},  DOI={10.1590/S0103-50532012000600014},  number={6},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Pohl, Pawel and Stecka, Helena and Greda, Krzysztof and Jamroz, Piotr},  year={2012},  month={Jun},  pages={1098–1103} }