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Nieder A.; et al. (2017). "Inside the corvid brain—probing the physiology of cognition in crows". Current Opinion in Behavioral Sciences. 16 (8): 8–14. doi:10.1016/j.cobeha.2017.02.005. S2CID44291562.
Baglione, V.; Marcos, J. M.; Canestrari, D.; Ekman, J. (2002). "Direct fitness benefits of group living in a complex cooperative society of carrion crows, Corvus corone corone". Animal Behaviour. 64 (6): 887–893. doi:10.1006/anbe.2002.2007. S2CID53200940.
Pettifor, R. A (1990). "The effects of avian mobbing on a potential predator, the European kestrel, Falco tinnunculus". Animal Behaviour. 39 (5): 821–827. doi:10.1016/S0003-3472(05)80945-5. S2CID53200478.
Nieder A.; et al. (2017). "Inside the corvid brain—probing the physiology of cognition in crows". Current Opinion in Behavioral Sciences. 16 (8): 8–14. doi:10.1016/j.cobeha.2017.02.005. S2CID44291562.
Baglione, V.; Marcos, J. M.; Canestrari, D.; Ekman, J. (2002). "Direct fitness benefits of group living in a complex cooperative society of carrion crows, Corvus corone corone". Animal Behaviour. 64 (6): 887–893. doi:10.1006/anbe.2002.2007. S2CID53200940.