@article{silva_2001,  title={Non Relativistic Limit in QFT: a Wilson Renormalization Group Approach in the Minkowski Space},  volume={31},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332001000200006},  DOI={10.1590/S0103-97332001000200006},  number={2},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Silva, A.J. da},  year={2001},  month={Jun},  pages={170–178} }