@article{thomas_sodek_2006,  title={Amino acid and ureide transport in the xylem of symbiotic soybean plants during short-term flooding of the root system in the presence of different sources of nitrogen},  volume={18},  ISSN={1677-0420},  url={https://doi.org/10.1590/S1677-04202006000200010},  DOI={10.1590/S1677-04202006000200010},  number={2},  journal={Brazilian Journal of Plant Physiology},  publisher={Brazilian Journal of Plant Physiology},  author={Thomas, André Luís and Sodek, Ladaslav},  year={2006},  month={Apr},  pages={333–339} }