@article{ferreira_zavaglia_duek_2001,  title={Films of poly (L - lactic acid) / poly(hydroxybutyrate-co-hydroxyvalerate) blends: in vitro degradation},  volume={4},  ISSN={1516-1439},  url={https://doi.org/10.1590/S1516-14392001000100008},  DOI={10.1590/S1516-14392001000100008},  number={1},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Ferreira, B.M.P. and Zavaglia, C.A.C. and Duek, E.A.R.},  year={2001},  month={Jan},  pages={34–42} }