@misc{indiciae6807795ebcc8,
  title = {Completely Integrable Partial Differential Equations in Normed Linear Spaces.},
  author = {A D Michal},
  year = {1953},
  doi = {10.1073/pnas.39.10.1089},
  url = {https://pubmed.ncbi.nlm.nih.gov/16589379/},
  note = {Source identifier: 16589379}
}