@article{peduto_frota-pessôa_1997,  title={Real Space Electronic Structure Calculations for Metallic Surfaces},  volume={27},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97331997000400022},  DOI={10.1590/S0103-97331997000400022},  number={4},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Peduto, Pascoal R. and Frota-Pessôa, Sonia},  year={1997},  month={Dec},  pages={574–584} }