@article{pérez_bonilla_martínez_1999,  title={Phytoplankton community of a polymictic reservoir, La Plata River basin, Uruguay},  volume={59},  ISSN={0034-7108},  url={https://doi.org/10.1590/S0034-71081999000400002},  DOI={10.1590/S0034-71081999000400002},  number={4},  journal={Revista Brasileira de Biologia},  publisher={Instituto Internacional de Ecologia},  author={PÉREZ, M. C. and BONILLA, S. and MARTÍNEZ, G.},  year={1999},  month={Nov},  pages={535–541} }