@article{cavalcante_borges_2004, title={Phase-shift definition for pion-nucleon scattering from chiral perturbation theory}, volume={34}, ISSN={0103-9733}, url={https://doi.org/10.1590/S0103-97332004000200024}, DOI={10.1590/S0103-97332004000200024}, number={1a}, journal={Brazilian Journal of Physics}, publisher={Sociedade Brasileira de Física}, author={Cavalcante, Isabela P. and Borges, J. Sá}, year={2004}, month={Mar}, pages={259–262} }