@article{queirós_2009,  title={Generalised cascades},  volume={39},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332009000400019},  DOI={10.1590/S0103-97332009000400019},  number={2a},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Queirós, Sílvio M. Duarte},  year={2009},  month={Aug},  pages={448–452} }