@article{pereira_bezerra_freire_freire_farias_2006,  title={Energy levels in Si and SrTiO3-based quantum wells with charge image effects},  volume={36},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332006000300030},  DOI={10.1590/S0103-97332006000300030},  number={2a},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Pereira, T. A. S. and Bezerra, M. G. and Freire, J. A. K. and Freire, V. N. and Farias, G. A.},  year={2006},  month={Jun},  pages={347–349} }