@article{2004,  title={Foreword},  volume={34},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332004000300001},  DOI={10.1590/S0103-97332004000300001},  number={2a},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  year={2004},  month={Jun},  pages={335–335} }