@article{mavromatos_2005,  title={Dark energy in the universe, the irreversibility of time and neutrinos},  volume={35},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332005000200013},  DOI={10.1590/S0103-97332005000200013},  number={2a},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Mavromatos, N. E.},  year={2005},  month={Jun},  pages={284–295} }