@misc{indiciaeb07a485db5a2,
  title = {Chimpanzee problem comprehension: insufficient evidence.},
  author = {E S Savage-Rumbaugh and D M Rumbaugh},
  year = {1979},
  doi = {10.1126/science.505009},
  url = {https://pubmed.ncbi.nlm.nih.gov/505009/},
  note = {Source identifier: 505009}
}