@article{culetu_2006,  title={On a gravitational cutoff for the vacuum energy},  volume={36},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332006000400016},  DOI={10.1590/S0103-97332006000400016},  number={2b},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Culetu, Hristu},  year={2006},  month={Jun},  pages={562–565} }