@article{firme_antunes_esteves_2008,  title={Electronic nature of the aromatic adamantanediyl ions and its analogues},  volume={19},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532008000100020},  DOI={10.1590/S0103-50532008000100020},  number={1},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Firme, Caio L. and Antunes, O. A. C. and Esteves, Pierre M.},  year={2008},  pages={140–149} }