Hertler and Volmer, «Assessing Prey Competition.»

Churchill, Thin on the Ground, 271–273.

D. Stanford, R. Bonnichsen, and R. Morlan, «The Ginsberg Experiment: Modern and Prehistoric Evidence of a Bone-Flaking Technology,» Science 212 (1981): 438–440, doi: 10.1126/science. 212.4493.438.