@article{luna_menon_montanha_2004,  title={Extensions of the extrema bounds for the pomeron intercept to meson-proton, gamma-proton and gamma-gamma scattering},  volume={34},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332004000200026},  DOI={10.1590/S0103-97332004000200026},  number={1a},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Luna, E. G. S. and Menon, M. J. and Montanha, J.},  year={2004},  month={Mar},  pages={268–271} }