@misc{indiciae98a49765061d,
  title = {Generalized Concavity Theorems.},
  author = {M Morse},
  year = {1935},
  doi = {10.1073/pnas.21.6.359},
  url = {https://pubmed.ncbi.nlm.nih.gov/16587980/},
  note = {Source identifier: 16587980}
}