Oldest Homo and Pliocene biogeography of the Malawi rift
  1. Schrenk F
  2. Bromage TG
  3. Betzler CG
  4. Ring U
  5. Juwayeyi YM
(1993)
Nature 365:833–836. PMID 8413666
https://doi.org/10.1038/365833a0