@misc{indiciaec4fb04642888,
  title = {Light forces in two crossed standing waves with controlled time-phase difference.},
  author = {A Hemmerich and D Schropp and TW Hänsch},
  year = {1991},
  doi = {10.1103/physreva.44.1910},
  url = {https://pubmed.ncbi.nlm.nih.gov/9906159/},
  note = {Source identifier: 9906159}
}