@misc{indiciae61c690450a5b,
  title = {Missing particles and modes.},
  author = {ES Ackleh and GD Mahan},
  year = {1994},
  doi = {10.1103/physrevb.50.7272},
  url = {https://pubmed.ncbi.nlm.nih.gov/9974701/},
  note = {Source identifier: 9974701}
}