@misc{indiciaee2aae648244c,
  title = {Concerning Certain Solvable Equations with Functional Derivatives.},
  author = {A D Michal},
  year = {1926},
  doi = {10.1073/pnas.12.2.113},
  url = {https://pubmed.ncbi.nlm.nih.gov/16587065/},
  note = {Source identifier: 16587065}
}