@misc{indiciae594546b4f19a,
  title = {Generalized semiclassical-phase-index formulas via sequential stationary phase.},
  author = {G Campolieti and P Brumer},
  year = {1996},
  doi = {10.1103/physreva.53.2958},
  url = {https://pubmed.ncbi.nlm.nih.gov/9913232/},
  note = {Source identifier: 9913232}
}