@misc{indiciae5556186a617f,
  title = {Density Functional for van der Waals Forces at Surfaces.},
  author = {E Hult and Y Andersson and BI Lundqvist and DC Langreth},
  year = {1996},
  doi = {10.1103/physrevlett.77.2029},
  url = {https://pubmed.ncbi.nlm.nih.gov/10061839/},
  note = {Source identifier: 10061839}
}