@misc{indiciaebb95b37a5257,
  title = {Purposive behavior as a basis for objective communication between chimpanzees.},
  author = {E W Menzel},
  year = {1975},
  doi = {10.1126/science.1162352},
  url = {https://pubmed.ncbi.nlm.nih.gov/1162352/},
  note = {Source identifier: 1162352}
}