@article{barone_flores-hidalgo_2010,  title={Vacuum energies and multipole interactions},  volume={40},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332010000200011},  DOI={10.1590/S0103-97332010000200011},  number={2},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Barone, F.A. and Flores-Hidalgo, G.},  year={2010},  month={Jun},  pages={188–194} }