@article{silva_anefalos_r. filho_2003,  title={Relative intensity of bilateral trade flows, regional integration, and trade performance: the case of Brazil, 1984-1998},  volume={41},  ISSN={0103-2003},  url={https://doi.org/10.1590/S0103-20032003000200002},  DOI={10.1590/S0103-20032003000200002},  number={2},  journal={Revista de Economia e Sociologia Rural},  publisher={Sociedade Brasileira de Economia e Sociologia Rural (SOBER)},  author={Silva, Valquiria da and Anefalos, Lilian C. and R. Filho, José Carlos G. dos},  year={2003},  month={Apr},  pages={345–360} }