@article{motta_2007,  title={Political economy of preferential trade agreement: the case of bilateral asymmetric negotiation},  volume={27},  ISSN={0101-3157},  url={https://doi.org/10.1590/S0101-31572007000200003},  DOI={10.1590/S0101-31572007000200003},  number={2},  journal={Brazilian Journal of Political Economy},  publisher={Centro de Economia Política},  author={Motta, Daniel Augusto},  year={2007},  month={Apr},  pages={193–208} }