@article{perdew1992,
  title={Accurate and simple analytic representation of the electron-gas correlation energy},
  author={John P. Perdew and Yue Wang},
  year={1992},
  journal={Physical review. B, Condensed matter},
  doi={10.1103/physrevb.45.13244},
  url={https://doi.org/10.1103/physrevb.45.13244}
}