@article{medri_medri_2002,  title={A Mathematical Model for the Removal of Organic Mater in Stabilization Ponds},  volume={45},  ISSN={1516-8913},  url={https://doi.org/10.1590/S1516-89132002000100014},  DOI={10.1590/S1516-89132002000100014},  number={1},  journal={Brazilian Archives of Biology and Technology},  publisher={Instituto de Tecnologia do Paraná - Tecpar},  author={Medri, Waldir and Medri, Vandir},  year={2002},  month={Mar},  pages={89–95} }