@article{hamester_balzer_becker_2012,  title={Characterization of calcium carbonate obtained from oyster and mussel shells and incorporation in polypropylene},  volume={15},  ISSN={1516-1439},  url={https://doi.org/10.1590/S1516-14392012005000014},  DOI={10.1590/S1516-14392012005000014},  number={2},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Hamester, Michele Regina Rosa and Balzer, Palova Santos and Becker, Daniela},  year={2012},  month={Mar},  pages={204–208} }