@misc{indiciae70f160483607,
  title = {Higher-derivative operators and DeWitt's WKB ansatz.},
  author = {HW Lee and PY Pac},
  year = {1986},
  doi = {10.1103/physrevd.33.1012},
  url = {https://pubmed.ncbi.nlm.nih.gov/9956720/},
  note = {Source identifier: 9956720}
}