@article{wang_2005, title={Perturbations around black holes}, volume={35}, ISSN={0103-9733}, url={https://doi.org/10.1590/S0103-97332005000700002}, DOI={10.1590/S0103-97332005000700002}, number={4b}, journal={Brazilian Journal of Physics}, publisher={Sociedade Brasileira de Física}, author={Wang, Bin}, year={2005}, month={Dec}, pages={1029–1037} }