@article{palhares_fraga_2007,  title={Cold and dense perturbative Yukawa theory with massive fermions},  volume={37},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332007000100010},  DOI={10.1590/S0103-97332007000100010},  number={1a},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Palhares, L. F. and Fraga, E. S.},  year={2007},  month={Mar},  pages={26–29} }