The Perdew-Wang 1991 correlation functional computes energies and densities using the designated local correlation functional.
J. P. Perdew, Proceedings of the 75. WE-Heraeus-Seminar and 21st Annual International Symposium on Electronic Structure of Solids held in Gaussig (Germany), March 11-15, 1991, P. Ziesche and H. Eschrig, eds., pp. 11-20.
J. P. Perdew, J. A. Chevary, S. H. Vosko, K. A. Jackson, M. R. Pederson, and D. J. Singh, Phys. Rev. B, 46, 6671, 1992.