@article{1999,  title={Proceedings of the 9th Brazilian Workshop on Semiconductor Physics},  volume={29},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97331999000400001},  DOI={10.1590/S0103-97331999000400001},  number={4},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  year={1999},  month={Dec},  pages={1–1} }