@misc{indiciaebab477529072,
  title = {Direct-space methods in phase extension and phase refinement. IV. The double-histogram method.},
  author = {L S Refaat and C Tate and M M Woolfson},
  year = {1996},
  doi = {10.1107/s0907444995008456},
  url = {https://pubmed.ncbi.nlm.nih.gov/15299697/},
  note = {Source identifier: 15299697}
}