@article{santos_2017,  title={Regional distribution of the National System of Innovation actors and economic development: an international comparison},  volume={37},  ISSN={0101-3157},  url={https://doi.org/10.1590/0101-31572017v37n04a11},  DOI={10.1590/0101-31572017v37n04a11},  number={4},  journal={Brazilian Journal of Political Economy},  publisher={Centro de Economia Política},  author={SANTOS, ULISSES PEREIRA DOS},  year={2017},  month={Oct},  pages={850–869} }