@misc{indiciae876c08078104,
  title = {Gaussian beam and pulsed-beam dynamics: complex-source and complex-spectrum formulations within and beyond paraxial asymptotics.},
  author = {E Heyman and L B Felsen},
  year = {2001},
  doi = {10.1364/josaa.18.001588},
  url = {https://pubmed.ncbi.nlm.nih.gov/11444551/},
  note = {Source identifier: 11444551}
}