@misc{indiciaeb2afdf3856a9,
  title = {T operators and their matrix elements for a general periodic potential.},
  author = {E Badralexe and AJ Freeman},
  year = {1987},
  doi = {10.1103/physrevb.36.1389},
  url = {https://pubmed.ncbi.nlm.nih.gov/9942968/},
  note = {Source identifier: 9942968}
}