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Groenewoud, Frank; Frommen, Joachim Gerhard; Josi, Dario; Tanaka, Hirokazu; Jungwirth, Arne Matthias; Taborsky, Michael (2016). Predation risk drives social complexity in cooperative breeders. Proceedings of the National Academy of Sciences of the United States of America - PNAS, 113(15), pp. 4104-4109. National Academy of Sciences NAS 10.1073/pnas.1524178113
Fischer, Stefan; Zöttl, Markus; Groenewoud, Frank; Taborsky, Barbara (2014). Group-size-dependent punishment of idle subordinates in a cooperative breeder where helpers pay to stay. Proceedings of the Royal Society. Series B - biological sciences, 281(1789), p. 20140184. Royal Society of London 10.1098/rspb.2014.0184