@article{graça_krein_2003,  title={Transport properties and equation of state of quark-nuclear matter},  volume={33},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332003000200029},  DOI={10.1590/S0103-97332003000200029},  number={2},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Graça, C.O. da and Krein, G.},  year={2003},  month={Jun},  pages={311–315} }