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Engelhardt, Sacha C.; Bergeron, Patrick; Gagnon, Alain; Dillon, Lisa; Pelletier, Fanie (2019). Using Geographic Distance as a Potential Proxy for Help in the Assessment of the Grandmother Hypothesis. Current Biology, 29(4), pp. 651-656. Cell Press 10.1016/j.cub.2019.01.027
