@misc{indiciae76403b5d83d3,
  title = {Second-order density matrix for a spin- projected single determinant.},
  author = {Hardisson, A. and Harriman, J. E.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670053030},
  note = {Source identifier: 19670053030}
}