@misc{indiciae5471607c2da9,
  title = {Excitations in time-dependent density-functional theory.},
  author = {H Appel and E K U Gross and K Burke},
  year = {2003},
  doi = {10.1103/physrevlett.90.043005},
  url = {https://pubmed.ncbi.nlm.nih.gov/12570418/},
  note = {Source identifier: 12570418}
}