@article{barofsky_1999,  title={Mass spectrometric analyses in agriculture and natural product research},  volume={29},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97331999000300006},  DOI={10.1590/S0103-97331999000300006},  number={3},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Barofsky, Douglas F.},  year={1999},  month={Sep},  pages={432–439} }