@article{pita_castilho_2020,  title={Separation of PET from other plastics by flotation combined with alkaline pretreatment},  volume={30},  ISSN={0104-1428},  url={https://doi.org/10.1590/0104-1428.03320},  DOI={10.1590/0104-1428.03320},  number={3},  journal={Polímeros},  publisher={Associação Brasileira de Polímeros},  author={Pita, Fernando and Castilho, Ana},  year={2020},  pages={e2020026} }