@article{carvalho_2015,  title={Why open source?},  volume={31},  ISSN={0102-311X},  url={https://doi.org/10.1590/0102-311XED010215},  DOI={10.1590/0102-311XED010215},  number={2},  journal={Cadernos de Saúde Pública},  publisher={Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz},  author={Carvalho, Marilia Sá},  year={2015},  month={Feb},  pages={221–222} }