Casella, R. C. (1958). "Energy-band structure of a hypothetical carbon metal." Phys. Rev. 109: 54-60.

The energy bands derived for C atoms in single face-centered cubic lattice by the OPW (orthogonalized plane wave) method are those for an almost perfect metal. The 3P ground-state potential is computed. Results of a general symmetry analysis appropriate for OPW method application to any face-centered cubic lattice are given.