@article{berredo-peixoto_shapiro_2005,  title={Higher derivative quantum gravity near four dimensions},  volume={35},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332005000700022},  DOI={10.1590/S0103-97332005000700022},  number={4b},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Berredo-Peixoto, Guilherme de and Shapiro, Ilya L.},  year={2005},  month={Dec},  pages={1099–1103} }