@article{ising_2000,  title={Letter},  volume={30},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332000000400002},  DOI={10.1590/S0103-97332000000400002},  number={4},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Ising, Jane},  year={2000},  month={Dec},  pages={648–648} }