@article{andrade_ferreira_domingues_2004,  title={Zeta potential measurement in bioactive collagen},  volume={7},  ISSN={1516-1439},  url={https://doi.org/10.1590/S1516-14392004000400018},  DOI={10.1590/S1516-14392004000400018},  number={4},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Andrade, Ângela Leão and Ferreira, José Maria Fontes and Domingues, Rosana Zacarias},  year={2004},  month={Oct},  pages={631–634} }