@article{bezerra_antoniosi filho_2014,  title={Characterization and quantification by gas chromatography of free steroids in unsaponifiable matter of vegetable oils},  volume={25},  ISSN={0103-5053},  url={https://doi.org/10.5935/0103-5053.20130288},  DOI={10.5935/0103-5053.20130288},  number={2},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Bezerra, Kelly da S. and Antoniosi Filho, Nelson R.},  year={2014},  month={Feb},  pages={238–245} }