@article{alcaniz_2006,  title={Dark energy and some alternatives: a brief overview},  volume={36},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332006000700002},  DOI={10.1590/S0103-97332006000700002},  number={4a},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Alcaniz, J. S.},  year={2006},  month={Dec},  pages={1109–1117} }