@misc{indiciaea7dc4f59dfad,
  title = {The classification of the complex primitive infinite pseudogroups.},
  author = {V Guillemin and D Quillen and S Sternberg},
  year = {1966},
  doi = {10.1073/pnas.55.4.687},
  url = {https://pubmed.ncbi.nlm.nih.gov/16591345/},
  note = {Source identifier: 16591345}
}