@misc{indiciaef1e9a7c3bbc1,
  title = {Generalized saddle-point method for Feshbach resonances.},
  author = {M Bylicki},
  year = {1989},
  doi = {10.1103/physreva.39.3316},
  url = {https://pubmed.ncbi.nlm.nih.gov/9901633/},
  note = {Source identifier: 9901633}
}