@misc{indiciaee493e2ae9923,
  title = {Australopithecus, Homo erectus and the single species hypothesis.},
  author = {R E Leakey and A C Walker},
  year = {1976},
  doi = {10.1038/261572a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/778631/},
  note = {Source identifier: 778631}
}