@misc{indiciae22278efe1eba,
  title = {Exponential Transforms and Appell Polynomials.},
  author = {R P Boas},
  year = {1948},
  doi = {10.1073/pnas.34.10.481},
  url = {https://pubmed.ncbi.nlm.nih.gov/16578309/},
  note = {Source identifier: 16578309}
}