@misc{indiciae565bbf2f2cdc,
  title = {Bargmann's theorem and position-dependent effective mass.},
  author = {K Kawamura and RA Brown},
  year = {1988},
  doi = {10.1103/physrevb.37.3932},
  url = {https://pubmed.ncbi.nlm.nih.gov/9945023/},
  note = {Source identifier: 9945023}
}