@misc{indiciae76bc115c9528,
  title = {Propagator for the delta -function potential moving with constant velocity.},
  author = {BK Cheng and da Luz MG},
  year = {1993},
  doi = {10.1103/physreva.47.4720},
  url = {https://pubmed.ncbi.nlm.nih.gov/9909498/},
  note = {Source identifier: 9909498}
}