@article{wellen_2014,  title={Effect of polystyrene on poly(ethylene terephthalate) crystallization},  volume={17},  ISSN={1516-1439},  url={https://doi.org/10.1590/1516-1439.302614},  DOI={10.1590/1516-1439.302614},  number={6},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Wellen, Renate Maria Ramos},  year={2014},  month={Nov},  pages={1620–1627} }