@misc{indiciaedbf03cf17631,
  title = {Effective generating functions for quantum canonical transformations.},
  author = {GI Ghandour},
  year = {1987},
  doi = {10.1103/physrevd.35.1289},
  url = {https://pubmed.ncbi.nlm.nih.gov/9957789/},
  note = {Source identifier: 9957789}
}