@misc{indiciae2f7af41ca8ed,
  title = {Valley approximation for the Borel function.},
  author = {H Kikuchi},
  year = {1992},
  doi = {10.1103/physrevd.45.1240},
  url = {https://pubmed.ncbi.nlm.nih.gov/10014496/},
  note = {Source identifier: 10014496}
}