Allomaternal Nursing in Humans. - Hewlett, Barry S.; Winn, Steve; Crittenden, Alyssa N.; Fouts, Hillary N.; Hinde, Katie; Henry, Paula Ivey; Morelli, Gilda A.; Tronick, Edward Z.; Konner, Melvin; Sellen, Daniel; Takada, Akira; Terashima, Hideaki (Current Anthropology, 2014)