@article{albuquerque_callado_2015,  title={Understanding Bitcoins: Facts and Questions},  volume={69},  ISSN={0034-7140},  url={https://doi.org/10.5935/0034-7140.20150001},  DOI={10.5935/0034-7140.20150001},  number={1},  journal={Revista Brasileira de Economia},  publisher={Fundação Getúlio Vargas},  author={Albuquerque, Bruno Saboia de and Callado, Marcelo de Castro},  year={2015},  month={Jan},  pages={3–16} }