@article{oliveira_guimarães_1997,  title={Electrical Current Resonance and Current Echoes: A Proposed new Experimental Technique in Solid State Physics},  volume={27},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97331997000400008},  DOI={10.1590/S0103-97331997000400008},  number={4},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Oliveira, I.S. and Guimarães, A.P.},  year={1997},  month={Dec},  pages={475–480} }