@article{saab_martin-neto_2008,  title={Characterization by Electron Paramagnetic Resonance of organic matter in whole soil (Gleysoil) and organic-mineral fractions},  volume={19},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532008000300007},  DOI={10.1590/S0103-50532008000300007},  number={3},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Saab, Sérgio Costa and Martin-Neto, Ladislau},  year={2008},  pages={413–417} }