@misc{indiciae7640eba35621,
  title = {Subelliptic estimates for complexes.},
  author = {V Guillemin and S Sternberg},
  year = {1970},
  doi = {10.1073/pnas.67.1.271},
  url = {https://pubmed.ncbi.nlm.nih.gov/16591855/},
  note = {Source identifier: 16591855}
}